### Home > PC3 > Chapter 12 > Lesson 12.3.1 > Problem 12-129

12-129.

Consider the discrete random variable with the following distribution.

Explain why this is a valid probability model.

In a valid probability model, the sum of the probabilities of the outcomes must be

. Also, the probability of each outcome must be between and , inclusive. Create a relative frequency histogram for this probability distribution.

Calculate the expected value of

.