find the expected value of a random variable with the following probability distribution :
2
3
4
5
6
7
8
9
10
11
12
———
1/36
1/18
1/12
1/9
5/36
1/6
5/36
1/9
1/12
1/18
1/36

Find The Expected Value Of A Random Variable With The Following Probability Distribution :234567891011121/361/181/121/95/361/65/361/91/121/181/36

Answers

Answer 1

Answer:

7

Step-by-step explanation:

correct with acellus

Answer 2

The expected value of a random variable with the following probability distribution will be 7.

How to calculate the expectation of a discrete random variable?

Expectation can be taken as a weighted mean, weights being the probability of occurrence of that specific observation.

Thus, if the random variable is X, and its probability mass function is given being  f(x) = P(X = x), then we have:

[tex]E(X) = \sum_{i=1}^n( f(x_i) \times x_i)[/tex]

[tex]\rm E(X)=2 \times \frac{1}{36} +3 \times \frac{1}{28} +4 \times \frac{1}{12} +5 \times \frac{1}{9} +6 \times \frac{5}{36} + 7 \times \frac{1}{6} +8 \times \frac{5}{36}+9 \times \frac{1}{9} +10 \times \frac{1}{12} +11 \times \frac{1}{18} +12 \times \frac{1}{36} \\\\ E(X)=7[/tex]

Hence the expected value of a random variable will be 7.

To learn more about the expected value refer to the link:

https://brainly.com/question/4515179


Related Questions

3(x+5) - 3 = 2(3x + 1) - 3
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Answers

Answer:

Step-by-step explanation:

1 solution: x=13/3

I NEED HELP IM BEGGING WILL MARK BRAINLEST
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Answer:

a = 5 c =11

Step-by-step explanation:

Answer:

sqrt[(80^2) + (20^2)] = (bottom base of the entire rectangle)

= 20(sqrt(17)) units or about 82.46211 units

find angle at bottom corner

arctan(20/80) = about 14.04624 degrees

cos(14.04624) = 20(sqrt17) / (80+a)

solve for a: --> a = 5 units

use pythag for side c

(20^2) + (5^2) = c^2

c is about 20.6155 units or 5(sqrt17)

Step-by-step example:

Melanie's fruit punch recipe calls for 6 cups of apple juice for every 3 cups of carrot juice.
How many cups of carrot juice are used for each cup of apple juice?

Answers

Answer:

1/2 cup of carrot juice for each cup of apple juice.

Step-by-step explanation:

The ratio of carrot juice to apple juice is 3:6

Also written as 1:2

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Find the slope

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Answers

Answer:

m = -2

Step-by-step explanation:

Let (x1 , y1 ) = ( 3 , 8) and (x2 , y2 ) = ( 2 , 10)

Now

slope (m)

= y2 - 1 / x2 - x1

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Answer:

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Step-by-step explanation:

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Answers

-8/5 is the correct answer
8\5 is the answer hope it helps

Solve the following equation:
1/3(y - 2) -5/6 (y + 1) =3/ 4(0 - 3) - 2

Answers

Answer:

11/5

Step-by-step explanation:

If you need help with more problems like this you can use m a t h w a y. (remove the spaces)  :)

Which temperature is greater, -20F or -60F

Answers

Answer:

-20

Step-by-step explanation:

Answer:

It's -20F :)

Step-by-step explanation:

hsbshehehebvdhshhakakkanabsbxh

A swimming pool is shaped like a cylinder with a radius of 15 feet and a height of 6 feet

Answers

Answer:

4239 cubic feet

Step-by-step explanation:

V=[tex]\pi[/tex][tex]r^{2} *h[/tex]

V=3.14*225*6

V=3.14*1350

V=4239

An anchor is released from a boat and begins sinking. Its
velocity after it hits the water can be expressed as –10 feet
per second. Where is the anchor with respect to the surface
9 seconds after it hits the water?

Answers

you multiply -10 and nine and you get -90 hope this helps.

Step-by-step explanation:

9. Find the value of x.

(look at the picture)

Answers

Answer:

use the fact that triangles only have room for 180 degrees inside, so all the angles must add up to 180, no more, no less. You can also jsut insert the options for x values until you find the right one(shouldnt take too long).

Step-by-step explanation:

Which statement describes a unit rate?
A.Alex eats 3 apples.
B.Kyle runs 3 miles over 2 days.
C. Zack reads 3 pages of his book per minute. D.Michael adds 3 cups of sugar for every 2 cups of flour​

Answers

Answer:

c. 3 pages per minute

.......

0.2(10-5c)=5c-16


answer correctly or reported

Answers

Answer:

c=3

Step-by-step explanation:

0.2(10-5c)=5c-16

2 - 1c = 5c - 16

2 = 6c - 16

18 = 6c

3 = c

A system of inequalities can have no solution?
a)true
b)false

Answers

Answer:

True

Step-by-step explanation:

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Answers

Answer:

10

Step-by-step explanation:

125 divided by 12.5

Answer: 10 dresses

Step-by-step explanation:

125/12.5=10

For every dress she needs 12 1/2 yards of fabric so what multiple of 12.5 is equal to or less than 125 and thats 10

STEP BY STEP PLEASE
If the perimeter of square 3 is 36 units and the perimeter of square 2 is 48 units, what is the area of square 1?

Answers

We can find the side length of square 3 by dividing by 4, which is 9.

Then, we find the side length of square 2 by dividing it by 4, which is 12.

To find the AREA of square 1, we do a^2+b^2=c^2. This is basically adding up area of square 1 and square 2 to get square 3.

a^2+b^2=c^2
9^2+12^2=c^2
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So the area is 225 units.

Answer:

225

Step-by-step explanation:

length of side in square 3 = 36/4

=9

length of side in square 2 = 48/ 4

= 12

using pythagorus theorem you can find side of square 1

take the triangle between 3 and 2

9^2 + 12^2 = length of side 1^2

81 + 144 = l^2

225 = l^2

l = 15

therefore length of side 1 is 15

area of square 1 = 15^15

area = 225 square units

hope this helped

ask if you didn't understand something or you think i am wrong:)

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Answers

Answer:

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Step-by-step explanation:

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Answers

Answer:

A linear function is written as:

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An exponential equation is written as:

y = A*(r)^x

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Answers

Answer:

3 4/7

Step-by-step explanation:

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Answer:

3 4/7

Step-by-step explanation:

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Answers

Answer:

Step-by-step explanation:

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Orlando wants to buy a new TV. The price was $985. When he goes to the store a second time, he found that price was marked down by 35%. What is the new price of the TV?​

Answers

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Answers

I would go out on a limb and say it’s A

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Answers

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Step-by-step explanation:

Answer:

2.7725

Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:


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Answers

Answer:

David is saving up money to buy a new car. He had $1,350 saved up 4 months ago, and now has $2,150. He adds the same amount of money each month

Step-by-step explanation:

I'm not clear on your actual question, but I'm guessing you want to know how much money he has saved each of the last four months.

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The population of a city is 250,000 and the annual growth rate is 2.2% Write an equation to model the population y after x years.

Answers

Answer:

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Answers

Answer:

35 years old

Step-by-step explanation:

Let Janice's age = j.

Let Ross's age = r.

j = 5r

j = r + 28

Set the equations equal to each other.

5r = r + 28

4r = 28

r = 7

j = 5r

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Answers

Answer:

I think y=-5 , x = 3

Answer:

y = 5/3x - 5

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Answers

Answer:

D(16)

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