Solved: A discrete random variable x can assume five

Chapter 4, Problem 13E

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QUESTION:

Problem 13E

A discrete random variable x can assume five possible values: 2, 3, 5, 8, and 10. Its probability distribution is

shown here:

x

2

3

5

8

10

p(x)

.15

.10

.25

.25

a. What is p(5)?

b. What is the probability that x equals 2 or 10?

c. What is P(x≤ 8)?

Questions & Answers

QUESTION:

Problem 13E

A discrete random variable x can assume five possible values: 2, 3, 5, 8, and 10. Its probability distribution is

shown here:

x

2

3

5

8

10

p(x)

.15

.10

.25

.25

a. What is p(5)?

b. What is the probability that x equals 2 or 10?

c. What is P(x≤ 8)?

ANSWER:

Solution:

Step 1 of 2:

A discrete random variable x can assume five values: 2,3,5,8, and 10.

Its probability distribution is given as

 x

2

3

5

8

10

P(x)

0.15

010

-

.25

.25

We have to find,

  1.  P(5).
  2. The probability that x equals 2 or 10.
  3. P(x.

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