In an honors math class of 25 students, 15 are boys and 10 are girls. On the final exam, 6 boys and 3 girls received a grade of A. If a student is chosen at
random from this class, what is the probability of choosing a girl or a student who did not receive an A on the exam?
1
0.76
2
0.64
3
0.40
0.28
Submit Answer

Answers

Answer 1

Answer:

Step-by-step explanation:

b=boy

a= a on the exam

b=15

b∩a=6

b'∩a=3

b'∪a'=?

b'∪a'= b'+a'-b'∩a'

a= b∩a+b'∩a (law of total probability) = 9

a'= 25-9 = 16

b'= 25-15= 10

16+10-7=19

19/25= .76


Related Questions

A bottle of medicine holds 0.25 litres.
The instructions on the bottle of medicine say: 'Take two 5 ml spoonfuls three times a day
How many days will a full bottle of medicine last?

Answers

Answer:

this is the correct answer happy

what is the speed of light?​

Answers

Answer:

The universal physical constant c, or the speed of light in vacuum, is essential in many fields of physics. It has a precise value of 299792458 metres per second.

Step-by-step explanation:

Answer:

299 792 458 m / s

Step-by-step explanation:

In terms of sig figs, it can be 3.0 * 10^8 m/s

Evaluate f(x) at x =-3/4

f(x) = 2 - 6x - 4x^2


Answers

Answer:

4.25 is the final answer!!!

Finish the sentence: Two quantities are directly proportional when they:

A) increase and decrease at different rates

B) run into each other

C) increase and decrease at the same rate

D) only increase at the same rate

Answers

Direct proportion simply means the relationship between two variables when C. They increase and decrease at the same rate.

Direct proportion simply means the relationship that exists between two variables whereby the ratio is equal to a constant value.

In a direct proportion, it should be noted that an increase in a quantity will lead to a corresponding increase in the other quantity. Also, a decrease in one quantity also results in a corresponding decrease.

Read related link on:

https://brainly.com/question/25780550

QUICK! I NEED HELP!!
------------------
t + 9.35 = 12 1/4

Enter your answer as either a decimal or a mixed number in simplest form in the box.

t =

Answers

Answer:

2.9

Step-by-step explanation:

Answer:

t = 2.9t= 2 9/10

Step-by-step explanation:

t + 9.35 = 12 1/4

t + 9.35 = 12.25

t  = 12.25 - 9.35

t = 2.9

(2.9) + 9.35 = 12 1/4

12.25=12 1/4

12 1/4 = 12 1/4

Find the square root of the following: 36
121​

Answers

Square root of 36 is 6 and for 121 its 11
36 square root of it is 6
121 square root of it is 11

Hey can anyone help me with these please and thank you !

Answers

Answer:

I would be able to help you but I cant see the work that well. hope you figure it out.

Step-by-step explanation:

Solve | x+4| -5=6
A. x= -7 and = -15
B = 7 and = -7
C. x = 7 and = -15
D. x = -7 and = 15

Answers

Answer:

b

Step-by-step explanation:

8
There are 5 times as many pens in box A as in box B.
Teddy moves 82 pens
from box A to box B.
Both boxes now have the same number of
pens.
How many pens are in box A now?

Answers

Answer:

123 pens in Box A

Step-by-step explanation:

To solve this we will rewrite the word problem as an equation...

5x (A)

x (B)

When Teddy moves 82 pens from A to B, he is subtracting 82 pens from Box A and adding 82 pens to Box B...

5x - 82 (Change in Box A - subtraction)

x + 82 (Change in Box B - addition)

The problem now states that Box A and Box B are equal...

5x - 82 = x + 82

--- subtract x from both sides ---

4x - 82 = 82

--- add 82 to both sides ---

4x = 164

--- divide both sides by 4 ---

x = 41 pens

Now, we replace the x in the expression "5x - 82" with 41...

5(41) - 82 = 205 - 82

205 - 82 = 123

123 pens in Box A

Hope this Helps!

Write a polynomial function with given zeros √8, √10

Answers

Answer:

y = x^2 - (sqrt(8) + sqrt(10))x + sqrt(80)

Step-by-step explanation:

we do y = (x- sqrt8)(x -sqrt10) and simplify

A board 120 inches long is divided into 2 sections. If the ratio of the 2 sections is 3:5, what are the lengths of the sections?
15 inches, 105 inches
A
B
24 inches, 96 inches
C 40 inches, 80 inches
D 45 inches, 75 inches

Answers

Answer:

D 45 inches, 75 inches

Step-by-step explanation:

3:5  is 3 + 5 = 8 parts

one section is 3/8 of 120 = 45 inches

other section is 5/8 of 120 = 75 inches

D 45 inches, 75 inches

Jenny bought some books she spent a total of 58 dollars after a discount of 7 dollars off of her total purchase . each book cost 5 dollars . How many books did she buy

Answers

Answer:

13 books

Step-by-step explanation:

Total cost without the discount = $58 + $7 = $65

Cost of one book = $5

Let the number of books be n

5n = 65

n = 65/5

n = 13

Try solving this equation. m + 18 = -112

Answers

Answer: m = -130

-----------------------------------

m + 18 = - 112

m = -112 - 18

m = - 130

<3

Answer:

m=94

Step-by-step explanation:

m+18=‐112m=‐112‐18=‐94m=‐94

a pacific seahorse eats about 56 shrimp per week how much does it eat per day

Answers

56 divided by 7
Equals 8

8 is the answer

These triangles are similar select all equations that could be used to solve for the side indicated by the?

Answers

Answer:

➟ Two triangles are similar then ratio of their corresponding sides are equal.

(Option 3 is correct)

★ Criteria for similarity of two triangles

i.) Their corresponding angles are equal.

ii.) Their corresponding sides are proportional.

∆ABC ~ ∆DEF only if

∠A = ∠D

∠B = ∠E

∠C = ∠F

and

AB/DE

BC/EF

CA/FD

[ Some theorems ]

AAA - similarity

AA - similarity

SSS - similarity

SAS - similarity

Step-by-step explanation:

Suppose a principal amount of $7500 was invested at an interest rate of 6%. How long did it take to reach $10650?

Answers

Based on the information how long did it take to reach $10650 is 7years.

Given:

Principal=$7,500

Rate=6%

Amount=$10650

Time=?

Simple Interest(SI)=A-P

=$10650-$7500

=$3150

Time=(100×SI)/(p×r)

T=(100×3150)/(7500×6)

T=315,000/45,000

T=7 years

Inconclusion how long did it take to reach $10650 is 7years.

Learn more here:

https://brainly.com/question/15610358

The period it took the $7,500 investment to reach a future value of $10,650 at a compounding interest rate of 6% is 6 years.

What is the future value?

The future value refers to the compounded value of present cash flows in the future, using an interest rate.

The future value can be determined using the future value table or formula.

We can also determine the future value using an online finance calculator, which also enables us to determine the period required to get a stated future value.

Data and Calculations:

PV (Present Value) = $7,500

I/Y (Interest per year) = 6%

PMT (Periodic Payment) = $0

FV (Future Value) = $10,650

Results:

N (# of periods) = 6 years

Total Interest = $3,142.17

Thus, the period it took the $7,500 investment to reach a future value of $10,650 at a compounding interest rate of 6% is 6 years.

Learn more about future values and periods at https://brainly.com/question/12890404 and https://brainly.com/question/20392017

Can someone help me please

Answers

Answer:

$750

Step-by-step explanation:

100% rep $2500

 10% rep $250

30% rep $750

Answer: $750

Step-by-step explanation: If Sonya spent 30% of her total money spent on rent, this means that she spent 30% * 2500 this month. In other words, she spent 0.3 * 2500 or $750.

Would appreciate brainly <3

A baseball team has 4 pitchers, who only pitch, and 12 other players, all of whom can play any position other then pitcher. For Saturday’s game, the coach has not yet determined which 9 players to use nor what the batting order will be, except that the pitcher will bat last. How many different batting orders at occur?

Answers

Answer::2,075,673,600 batting orders may occur.

Step-by-step explanation: A baseball team has 4 pitchers, who only pitch, and 12 other players, all of whom can play any position other then pitcher.

Triangle ABC is graphed below. Translate the figure left 2 units and down 3 units.

Answers

Answer:

I think it's maybe  -4

Step-by-step explanation:

The slope of a line is -1/2 What is the slope of a line that is perpendicular to it?

Answers

the negative reciprocal of the slope of the other line.

George read 72% of a book. If he reads 270 pages how many pages are there in the book?

Answers

Answer:

375 pages

Step-by-step explanation:

270 = 72%

=> 270/72 = 72/72

=> 3.75 = 1%

=> Number of Book pages = 375

Hoped this helped.

Harley has 60 beads. There are 11 beads that are NOT round. The rest are round. How many round beads does Michelle have?
HEEELPPP ASAP PLEASE

Answers

Answer:

49 round beds

Step-by-step explanation:

60 beds in total= 11 not round beds +?

-11 not round beds=--11 not round beds=?

49 round beds=49 round beds

That's the best way I could explain it.

The table shows two ways to mix red paint and white paint to make the same shade of pink. How many cups of red paint should be added to 1 cup of white paint to make the same shade of pink?​

Answers

This is the answer which is not right because this is for points...

if you get it right ill mark brainliest​

Answers

Answer:

Step-by-step explanation:

? i cant see what the page is

passez une bonne journée points faciles 2+2=?

Answers

4 because 2 + 2 is basically like counting to 4 in a faster way

Twice the sum of a number and 3 is equal to three times the difference of the number and 6. Find the number.
ENER
The number is a

(ANSWER QUICKLY)

Answers

Answer: 5

Step-by-step explanation:

Amakiri spent N125 for a camera and some film. The camera cost N100 more than
the film. What percent of the cost of the two items did Amakiri spend for the camera?

Answers

Answer:

90%

Step-by-step explanation:

N125 = 2x + N100

2x = N25

x = N12.5

camera = N100 + N12.5 = 112.5

Total = N125

(Camera/Total) x 100 = % spent on camera

(112.5 / 125) x 100 = 90%

Which is a graph of y= 3x-1?

Answers

Answer:

y=3x-1 = x=1/3

Step-by-step explanation:

y=3x-1

to find the 0-intercept at x, underline y = 0

0=3x-1

move the variable to the left side and change its sign

-3x=-1

divide both sides of the equation by -3

x=1/3

Answer: its bottom left, because look at the axis, y axis is the vertical line, check that closely :)

Please help me on my homework


i dont know what the next sequence is

Answers

The next term of the sequence is 9

The terms of the sequence are given as:

64, 49, 36, 25, 16,...

When the above sequence is analyzed, we can see that:

Each term of the sequence is a perfect square

So, the sequence can be rewritten as:

8^2, 7^2, 6^2, 5^2, 4^2, ....

The next term would be 3^2.

The square of 3 is 9

i.e. 3^2 = 9

Hence, the next term of the sequence is 9

Read more about sequence at:

https://brainly.com/question/7882626


Triangle abc is similar to triangles def ghi and jkl the scale factors for the dilations that show triangle abc is similar to each triangle are in the table

Find the side lengths of triangles def ghi and jkl record them in the table

Answers

DEF 8 10 14
GHI 12 15 21
JKL 2 5/2 7/2
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