Consider the following class definitions. public class Computer { private String memory; public Computer) { memory = "RAM"; } public Computer (String m) { memory = m; } public String getMemory () { return memory; ) } public class Smartphone extends Computer private double screenWidth, screenHeight; public Smart Phone (double w, double h) super("flash"); screenWidth = w; screenHeight = h; } public double get ScreenWidth() { return screenWidth; } public double getScreenHeight() { } return screenHeight; } The following code segment appears in a class other than Computer or Smartphone. + Computer myPhone = new Smart Phone (2.55, 4.53); System.out.println("Device has memory: " + myPhone.getMemory () ", screen area: " + myPhone.getScreenWidth()* myPhone.getScreenHeight() + " square inches."); The code segment is intended to produce the following output. Device has memory: flash, screen area: 11.5515 square inches. Which of the following best explains why the code segment does not work as intended?A. An error occurs during compilation because a Smartphone object cannot be assigned to the Computer reference variable myPhone. B. An error occurs during compilation because the Smartphone class has no getMemory method. C. An error occurs during compilation because the getScreenWidth and getScreenHeight methods are not defined for the Computer object myPhone. D. An error occurs at runtime because the Smartphone class has no getMemory method. E. An error occurs at runtime because the getScreenWidth and getScreenHeight methods are not defined for the Computer object myPhone.
Answers
Answer:
C.
Explanation:
The code provided in the question has many syntax errors. I have pasted a fixed version of the code below that fixes all the syntax errors but leaves the code as is. Using this code you can see that the error that is preventing the code from running properly is that
C. An error occurs during compilation because the getScreenWidth and getScreenHeight methods are not defined for the Computer object myPhone.
As you can see from the attached photo below, the code is failing to compile because the methods themselves are not able to be accessed by the myPhone object. This is happening during the compilation and thus causing the compilation to fail.
class Computer {
private String memory;
public Computer() {
memory = "RAM";
}
public Computer(String m) {
memory = m;
}
public String getMemory() {
return memory;
}
}
class Smartphone extends Computer {
private double screenWidth, screenHeight;
public Smartphone(double w, double h) {
super("flash");
screenWidth = w;
screenHeight = h;
}
public double getScreenWidth() {
return screenWidth;
}
public double getScreenHeight() {
return screenHeight;
}
}
public class Main{
//The following code segment appears in a class other than Computer or Smartphone
public static void main(String[] args) {
Computer myPhone = new Smartphone(2.55, 4.53);
System.out.println("Device has memory: " + myPhone.getMemory() + ", screen area: " + (myPhone.getScreenWidth()*myPhone.getScreenHeight()) +" square inches.");
}
}
The choice is "The getScreenWidth and getScreenHeight methods again for Computer object myPhone aren't declared, resulting in an error during compilation".
Class Description:In Options D and E errors would not occur since only compile-time errors, not run-time errors, would happen.Computer myPhone = new Smartphone(2.55,4.55);
A computer class was referenced by myPhone in this line. As a consequence, it's solely useful for computer students. Therefore, if you try to use the "getScreenwidth" and "getScreenHeight" functions of both the Smartphone class, which would be a sub-class of the Smartphone, you'll get an error. So, because the scope of the myPhone is limited to the parent class, the computer, it complies.Choices A and B will not produce an error since they are inside the scope of the myPhone.As a result, option C is the best argument for why the code section isn't working as it should.Find out more about the class here:
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Related Questions
Which descnptons are examples of Logistics Planning and Management Services workers? Check all that apply.
a. Lucreta supervises workers who organize the products in a warehouse b. Jeff organizes the redevelopment of areas contaminated by pollution.
c. Beatrice sells tickets to passengers for trips, and advises them about travel routes
d.Stephane inspects vencies and equipment to make sure they meet safety standards
d. Marcel oversees the transportation activities of an organization
e. Armand analyzes procedures for shipping and storage to identify ways to make them more efficient.
Answers
Answer:
The following below are descriptions of Logistics Planning and Management Services workers:
a. Lucreta supervises workers who organize the products in a warehouse
c. Beatrice sells tickets to passengers for trips, and advises them about travel routes
d.Stephane inspects vencies and equipment to make sure they meet safety standards
d. Marcel oversees the transportation activities of an organization
Explanation:
Emanuel studies hard for hours on end until bedtime, yet his grades could be better. What can he do to improve his academic performance?
sleep less
take breaks
eat more
work longer
Answers
Answer:
Its B! I know I'm late but for the other people that might get the same question like me.
Monster Collector
Write this program using an IDE. Comment and style the code according to the CS 200 Style Guide. Submit the source code files (.java) below. Make sure your source files are encoded in UTF-8. Some strange compiler errors are due to the text encoding not being correct.
Monster collector is a game of chance, where the user tries to collect monsters by guessing the correct numbers between 1 and 5. If the user doesn't guess the incorrect number, you catch the monster, otherwise, it gets away!
Example output:
Welcome to Monster Collector, collect 2 monsters to win!
A wild pikamoo appears! Guess a number between 1 and 5
5
You almost had it, but the monster escaped.
A wild bulbaroar appears! Guess a number between 1 and 5
1
Congratulations, you caught bulbaroar!
There are no more monsters to encounter!
You caught i monsters of 2
Keep training to be the very best!
Welcome to Monster Collector, collect 2 monsters to win!
A wild pikamoo appears! Guess a number between 1 and 5
3
Congratulations, you caught pikamoo !
A wild bulbaroar appears! Guess a number between 1 and 5
1
Congratulations, you caught bulbaroar!
There are no more monsters to encounter!
You caught 2 monsters of 2
You're the monster collector master!
A more detailed explanation of the requirements for each method will be in the method header comments - please follow these closely. Suggested order of completion:getMonster(), catchMonster(), printResult() then main(). Config.java contains an array of monsters, and the seed for your random number generator.
Answers
Answer:
In java:
import java.util.*;
public class Main{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int monsternum, usernum;
int count = 0;
Random rand = new Random();
String [] monsters = {"wild pikamoo","wild bulbaroar"};
for(int i =0;i<2;i++){
monsternum = rand.nextInt(5);
System.out.print("A "+monsters[i]+" appears! Guess a number between 1 and 5: ");
usernum = input.nextInt();
if(monsternum == usernum){ count++; System.out.println("Congratulations, you caught a "+monsters[i]+"!"); }
else{ System.out.println("You almost had it, but the monster escaped."); }
}
System.out.println("There are no more monsters to encounter!");
System.out.println("You caught "+count+" monsters of 2");
if(count!=2){ System.out.print("Keep training to be the very best!"); }
else{ System.out.print("You're the monster collector master!"); }
}
}
Explanation:
This declares monster and user number as integers
int monsternum, usernum;
Initialize count to 0
int count = 0;
Call the random object
Random rand = new Random();
Create a string array to save the monster names
String [] monsters = {"wild pikamoo","wild bulbaroar"};
Iterate for the 2 monsters
for(int i =0;i<2;i++){
Generate a monster number
monsternum = rand.nextInt(5);
Prompt the user to take a guess
System.out.print("A "+monsters[i]+" appears! Guess a number between 1 and 5: ");
Get user guess
usernum = input.nextInt();
If monster number and user guess are equal, congratulate the user and increase count by 1
if(monsternum == usernum){ count++; System.out.println("Congratulations, you caught a "+monsters[i]+"!"); }
If otherwise, prompt the user to keep trying
else{ System.out.println("You almost had it, but the monster escaped."); }
}
Print no monsters again
System.out.println("There are no more monsters to encounter!");
Print number of monsters caught
System.out.println("You caught "+count+" monsters of 2");
Print user score
if(count!=2){ System.out.print("Keep training to be the very best!"); }
else{ System.out.print("You're the monster collector master!"); }
please help me with this coding problem :)
Consider the following field and incomplete method of some class. The method calcTotal is intended to return the sum of all values in vals.
private int[] vals;
public int calcTotal()
{
int total = 0;
/* missing code */
return total;
}
Which of the code segments shown below can be used to replace /* missing code */ so that calcTotal will work as intended?
I.
for (int i : vals)
{
total += i;
}
II.
for (int pos = vals.length; pos > 0; pos--)
{
total += vals[pos];
}
III.
int pos = 0;
while (pos < vals.length)
{
total += vals[pos];
pos++;
}
I only
II only
I and III
II and III
III only
Answers
Answer:
ll and lll
Explanation:
list dont be a looser
Write a program that has the user input how many classes they are taking this semester and then output how many hours they will need to study each week. Assume that they need to study five hours per week for each class that they take.
Answers
This is for Python
class_amt = int(input('Amount of Classes: '))
hours = class_amt * 5
print(f'You need to study for {hours} hours every week')
The program that has the user input on how many classes they are taking this semester is written in python.
What is programming?Writing code to support certain activities in a computer, application, or software program and giving them instructions on how to do is known as computer programming.
It is well known that one of the hardest subjects to master is programming. It is not difficult to understand why some people find it challenging to learn how to code given how different it is from conventional educational methods, including college degrees in computer science. In general, programming is a calm profession.
class_amt = int(input('Amount of Classes: '))
hours = class_amt * 5
print(f'You need to study for {hours} hours every week')
Therefore, the codes are written above.
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Write a program to prompt the user to enter a fist name, last name, student ID and GPA. Create a dictionary called Student1 with the data. Repeat this for three students and create Student2 and Student3 dictionaries. Store the three students dictionaries to a new dictionary called ClassList. (ClassList will have Student1, Student2 and Student3 as sub dictionaries). Print out the ClassList. Then remove the GPA and print ClassList again.
Answers
Answer:
Answered below
Explanation:
#Program is written in Python
first_name = input ("Enter first name: ")
last_name = input ("Enter last name:")
student_id = int(input("Enter your ID"))
gpa = float(input ("Enter your GPA: "))
student1 = {}
student1["first_name"] = first_name
student1["last_name"] = last_name
student1["student_id"] = student_id
student1["gpa"] = gpa
//Repeat same code for student2 and student3
class_list = {"student1": {"first_name":"joy","last_name":"Son","student_id":"1","gpa":"3.5"},
#Fill in for student 2 and 3}
#To remove GPA for all students
del class_list["student1"]["gpa"]
del class_list["student2"]["gpa"]
del class_list["student3"]["gpa"]
print(class_list)
what are the charactaristic of computer with virus
Answers
Explanation:
One of the main characteristics of computer viruses is related to the fact that they are programs created by hackers that attack the code of a computer, infecting files on the computer's hard drive or its source code. Once the virus has been copied onto the computer, it can contaminate other computers that come into contact with the machine.
An entrepreneur wants to make an app to show what breeds of dogs are similar to each other. She wants to look at factors such as weight and energy level in her comparison. In the end, she wants each breed of dog to belong to a certain category based on these characteristics. What would be a sensible approach to solving this problem using clustering?
Answers
Answer
Dog breeds = observations, Average weight and energy level for each breed = variables. Each cluster is a category.
Explanation:
Using a method of clustering, she would be putting the dog breeds that are more similar together and in order to do this she has to look at various factors such as observation which are the dog breeds, and the average weight and energy level of the breeds, which represents variables. Every one of these clusters would be a category.
evaluate the arithmetic expression 234+567
Answers
Answer:
801
Explanation:
234 + 567 = 801
Which of the following statements is true for DMA: (only one correct answer) A. In DMA, Processor checks status until the operation is complete B. In DMA, Processor is interrupted when I/O module ready to execute data C. In DMA, no interrupt is produced D. In DMA, interrupt is sent when the task is completed E. None of the above
Answers
Answer:
D. In DMA, interrupt is sent when the task is completed
Explanation:
Note, the term Direct Memory Access simply refers to a computer feature that allows hardware subsystems to directly access the main system memory of a computer, without any the aid of the central processing unit (CPU).
It is a fact that while the transfer process is ongoing, an interrupt (interrupt signal) is not sent until when the task is completed.
In the range D5:D9 on all five worksheets, Gilberto wants to project next year's sales for each accessory, rounded up to zero decimal places so the values are easier to remember. In cell D5, enter a formula using the ROUNDUP function that adds the sales for batteries and chargers in 2021 (cell B5) to the sales for the same accessories (cell B5) multiplied by the projected increase percentage (cell C5). Round the result up to 0 decimal places. Fill the range D6:D9 with the formula in cell D5.
I just need the formula!!
A B C D
5
Batteries and chargers $ 123,274.42 1.50% $ 125,124
Answers
Answer:
Enter the following in D5:
=ROUNDUP((SUM(B5,B5)*C5),0)
Explanation:
Required
Add up B5 and B5, then multiply by C5.
Save result rounded up to 0 decimal places in D5
The required computation can be represented as:
D5 = (B5 + B5) * C5 [Approximated to 0 decimal places]
In Excel, the formula is:
=ROUNDUP((SUM(B5,B5)*C5),0)
Analyzing the above formula:
= ---> This begins all excel formulas
ROUNDUP( -> Rounds up the computation
(SUM(B5,B5) ---> Add B5 to B5
*C5) --> Multiply the above sum by C5
,0) ---> The computation is rounded up to 0 decimal places
To get the formula in D6 to D9, simply drag the formula from D5 down to D9.
The resulting formula will be:
=ROUNDUP((SUM(B6,B6)*C6),0)
=ROUNDUP((SUM(B7,B7)*C7),0)
=ROUNDUP((SUM(B8,B8)*C8),0)
=ROUNDUP((SUM(B9,B9)*C9),0)
Answer:
=ROUNDUP((SUM(B5)+(B5)*C5),0)
Explanation:
I followed Mr. Royal's explanation but the numbers just would not match.
I adjusted and used the formula above in cell D5 and I was able to get the correct sum.
01110100 01101000 01101001 01110011 00100000 01110011 01110101 01100011 01101011 01110011 00100000 01100010 01100001 01101100 01101100 01110011 00100000 01110101 00100000 01100010 01101001 01110100 01100011 01101000 01100101 01110011
Answers
Answer:
01110101 01101110 01101111 00100000 01110010 01100101 01110110 01100101 01110010 01110011 01100101 00100000 01100011 01100001 01110010 01100100 00100000 01000010 01000101 01010100 01000011 01001000
The catch clause ________. follows the try clause contains code to gracefully handle the exception type listed in the parameter list starts with the word catch followed by a parameter list in parentheses containing an ExceptionType parameter variable The catch clause does all of these
Answers
Answer:
all of these
Explanation:
The catch clause satisfies the following:
1. It starts with the word catch followed by a parameter list in parentheses containing an Exception Type parameter variable.
2. It follows the try clause.
3. It contains code to gracefully handle the exception type listed in the parameter list.
So, option ''all of these'' is correct
10. List three adaptations of wind-pollinated plants to promote pollination.
Answers
Answer:
No bright colors, special odors, or nectar.
Small.
Most have no petals.
Suppose users share a 25 Mbps link. Also suppose each user transmits continuously at 5 Mbps when transmitting, and each user transmits only 20 percent of the time. When circuit switching is used, how many users can be supported
Answers
Answer:
Two users have been supported as each user has half of the link bandwidth.
Explanation:
Two users require 1Mbps when transmitting, and fewer users transfer a maximum of 2 Mbps, and the available bandwidth of the shared link is 2 Mbps; there will be no queuing delay before connection. If three users, transmit, then bandwidth will be 3Mbps, and there will be queuing delay before the link. Link size = 2Mpbs, i.e. two users ,transmit, then a maximum of 2Mbps will require and does not exceed 2Mbps of bandwidth.
Create each of the following as separate classes: Room, Beds, Bath, Suite, SubRoom. Create a single RoomOrSuite class with the instance variables int numBeds, boolean hasBath, and int numSubrooms. Create a Suite class with the instance variables int numBeds, boolean hasBath, and int numSubrooms. Create a subclass Room of Suite which will inherit the instance variables numBeds and hasBath from Room, but not the instance variable int numSubrooms. Create a Room class with the instance variables int numBeds, and boolean hasBath. Create a subclass Suite of Room which will inherit the instance variables of Room and has an additional instance variable int numSubrooms. Create a Room class with the instance variables int numBeds, and boolean hasBath. Create a separate class Suite with the instance variable int numSubrooms.
Answers
Answer:
Explanation:
The following is written in Java and creates each one of the classes as requested. They can be used as seperate files within the same package but for the sake of simplicity, I am adding them together in this answer.
class RoomOrSuite {
int numBeds;
boolean hasBath;
int numSubrooms;
}
class Room {
int numBeds;
boolean hasBath;
}
class Beds {
}
class Bath {
}
class Suite {
int numBeds;
boolean hasBath;
private int numSubrooms;
}
class SubRoom {
}
class RoomOfSuite extends Room{
}
class SuiteOfRoom extends Room {
int numSubrooms;
}
Why is it important that you cite your sources?
Answers
Answer:
1. It gives credit to the authors/creators who's work you used.
2. Allows people who read your work a way find your sources if they want to learn more.
Explain the derived data types in C language with examples each
Answers
Answer:
Array, pointers, struct, and union are the derived data types.
third mean between two numbers 27 and 1 by 27 is 1 find the number of means
Answers
Answer:
third mean between two numbers 27 and 1 by 27 is 1 find the number of means
Explanation:
Critiquing design: for each of these teapots , finish the statement last on the right that critique the object design
Answers
Answer:
Hey you have to add your own opinion. Like What you like about the teapot. what you wish was different. And What if meaning if it was changed how would it differ.
Explanation:
I like the design or this teapot. I wish it was made a little different. What if it was made different, it would be of more use and better to me.
PLS HELP <3 Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
var a = 0;
var b = 1;
var c
for(i = 1; I <= 5; i++)
{
C = a +b;
a = b;
b = c;
}
document. write(c);
The output of the document. write statement is ____?
Answers
Answer:
The output of the document. write statement is
Explanation:
Initially: [tex]a = 0[/tex] and [tex]b = 1[/tex]
The iteration is repeated 5 times and the calculation is as follows:
First iteration:
[tex]c = a + b =0 + 1 = 1[/tex]:=> [tex]c = 1[/tex]
[tex]a = b[/tex]:=> [tex]a= 1[/tex]
[tex]b = c[/tex]:=>[tex]b = 1[/tex]
Second iteration:
[tex]c = a + b =1 + 1 = 2[/tex]:=> [tex]c = 2[/tex]
[tex]a = b[/tex]:=> [tex]a= 1[/tex]
[tex]b = c[/tex]:=>[tex]b = 2[/tex]
Third iteration:
[tex]c = a + b =1 + 2= 3[/tex]:=> [tex]c = 3[/tex]
[tex]a = b[/tex]:=> [tex]a= 2[/tex]
[tex]b = c[/tex]:=>[tex]b = 3[/tex]
Fourth iteration:
[tex]c = a + b =2 + 3= 5[/tex]:=> [tex]c = 5[/tex]
[tex]a = b[/tex]:=> [tex]a= 3[/tex]
[tex]b = c[/tex]:=>[tex]b = 5[/tex]
Fifth iteration:
[tex]c = a + b =3 + 5= 8[/tex]:=> [tex]c = 8[/tex]
[tex]a = b[/tex]:=> [tex]a= 5[/tex]
[tex]b = c[/tex]:=>[tex]b = 8[/tex]
End of iteration
document. write(c) prints the value of c which is 8
Write a method that reverses the sequence of elements in an array. For example, if you call the method with the array g
Answers
write a function that returns a list, where each member of list contains previous day’s value multiplied by 2.
Answers
Answer:
Explanation:
The following code is written in Java, the function takes in a list with the previous day's values. The function then uses that list, loops through it and multiplies each individual value by 2 and returns the modified list. The first red square represents the test case for the function, while the second red square in the image represents the output.
public static ArrayList<Integer> doubleIt(ArrayList<Integer> mylist) {
for (int x = 0; x<mylist.size(); x++) {
mylist.set(x, mylist.get(x)*2);
}
return mylist;
}
Peyton is taking a part-time job to earn some extra money. Every week the manager will provide a list of tasks and the number of hours each task requires. The tasks have to be done one by one from the first one and Peyton would do so until the time spent on all finished tasks exceeds 10 hours. Please construct a function take_tasks, which takes one integer list as the argument task_hours and prints out how many hours and how many tasks Peyton would do for that week. For example, the program below
tasks ([2, 1, 3, 1, 4, 2, 3])
will have the following output:
Finish 5 tasks in 11 hours
Note: you can use enumerate() to get the index of the task, which is available after the for loop terminates. However, keep in mind that index starts from 0.
time_spent = 0
time_spent = 10
if time_spent > 10: break
if time_spent > 0: break
for index, hour in task_hours:
print('Finish {} tasks in {} he
if time_spent == 10: break
def take_tasks (task_hours):
time_spent += index
time_spent += hour
for index, hour in enumerate
Answers
Answer:
The function is as follows:
def tasks(Petyontasks):
timespent = 0
for i, tsk in enumerate(Petyontasks):
if timespent<=10:
timespent+=tsk
else:
break
print("Finish "+str(i)+" tasks in "+str(timespent)+" hours")
Explanation:
The program in the question cannot be traced. Hence, the need to begin from scratch.
This defines the function
def tasks(Petyontasks):
This initializes timespent to 0
timespent = 0
This iterates through the tasks [i represents the count of the tasks while tsk represents the time on each task]
for i, tsk in enumerate(Petyontasks):
If timespent is less or equal to 10
if timespent<=10:
The tasks is added and the timespent is calculated
timespent+=tsk
If otherwise
else:
The loop is exited
break
This prints the required output
print("Finish "+str(i)+" tasks in "+str(timespent)+" hours")
Amed is utilizing a feature that will use two tables. The first table contains a primary key matched to a foreign key in the second table. The query results will include all entries from the first table. Which feature is he using?
A. left outer join
B. right outer join
C. self join
D. inner join
(edge 2021)
Answers
Based on the above, the feature that Amed is using is left outer join. Check more about the terms below.
What is a primary key?A primary key is known to be a primary keyword that is said to be a key one can find in a relational database made specially for each record.
Note that Based on the above, the feature that Amed is using is left outer join as it will help him to carryout the operations well.
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Answer: its A
Explanation:
What is THE GRAIN CRUSHER?
Answers
Answer:
Grain crusher is used to crush various kinds of grains, peas, buckwheat, beans, corn, linseed seeds and etc. Crushed grains are usually used to feed ruminant animals. Crushed grain are easier to digest, nutrients are assimilated more easily. Suitable as simply pellets chrusher.
Differentiate between computer engineering and software engineering
Answers
Answer:
Computer engineering is the field in tech that actually involves computers themselves. Software engineering is coding/designing software that runs on computers
Explanation:
3. Carmen Villa runs a cooking blog, where she posts a new recipe each day. She wants to get a sense
of where her visitors are from, so she can choose recipes from the areas where her website visitors
live. What other site usage information might she be able to gather, and how can she use it to
improve the cooking blog for her visitors?
Answers
Answer:
im kinda confused on this question is ther a answer key
Explanation:
Y’all what’s some celebrities that have kids??
Answers
Answer:
Angelina Jolie
Parents: Jon Voight, Marcheline Bertrand
Eddie Murphy
Parents: Charles Edward Murphy, Lillian Murphy
Sandra Bullock
Parents: Helga Meyer, John W. Bullock
Kate Hudson
Parents: Goldie Hawn, Bill Hudson
Katie Holmes
Parents: Kathleen A. Stothers-Holmes, Martin Joseph Holmes, Sr.
Reese Witherspoon
Parents: Betty Reese, John Witherspoon
Meryl Streep
Parents: Harry William Streep, Jr., Mary Wolf Wilkinson
Oprah Winfrey
Parents: Vernon Winfrey, Vernita Lee
Tina Fey
Parents: Zenobia Xenakes, Donald Fey
Uma Thurman
Parents: Nena von Schlebrügge, Robert Thurman
David Beckham
Parents: David Edward Alan Beckham, Sandra Georgina West
Susan Sarandon
Parents: Leonora Marie Criscione, Phillip Leslie Tomalin
Sofía Vergara
Parents: Julio Enrique Vergara Robayo, Margarita Vergara Dávila de Vergara
Hilary Duff
Parents: Susan Colleen Duff, Robert Duff
Miley Cyrus
Parents: Billy Ray Cyrus, Tish Cyrus
Zoë Kravitz
Parents: Lisa Bonet, Lenny Kravitz
Beyoncé
Parents: Tina Knowles, Mathew Knowles
Alexis Bledel
Parents: Nanette Bledel, Martin Bledel
Hugh Grant
Parents: Finvola Grant, James Grant
Britney Spears
Parents: Lynne Spears, Jamie Spears
Cindy Crawford
Parents: Jennifer Sue Crawford-Moluf, John Crawford
Adele
Parents: Penny Adkins, Mark Evans
Gwyneth Paltrow
Parents: Blythe Danner, Bruce Paltrow
Solange Knowles
Parents: Tina Knowles, Mathew Knowles
Find the number of ways in which a committee of 4 can be chosen from six boys and
six girls if it must contain at least one boy and one girl.
Answers
Answer:
465 ways
Explanation:
Atleast 1 girl and 1 boy
Possible combinations :
1 girl ; 3 boys = 6C1 ; 6C3
2 girls ; 2 boys = 6C2 ; 6C2
3 girls ; 1 boy = 6C3 ; 6C1
(6C1 * 6C3) + (6C2 * 6C2) + (6C3 * 6C1)
Combination formula:
nCr = n! ÷ (n-r)!r!
We can also use a calculator :
6C1 = 6
6C3 = 20
6C2 = 15
Hence,
(6C1 * 6C3) + (6C2 * 6C2) + (6C3 * 6C1)
(6 * 20) + (15 * 15) + (20 * 6)
120 + 225 + 120
= 465 ways