Suppose that the probabilities of a customer purchasing 0, 1, or 2 books at a book store are 0.2 , 0.3 , and 0.5 , respectively. What is the expected number of books a customer will purchase?

Expectation number of books a customer will purchase = 1.3

Step-by-step explanation:

x : 0 1 2

p (x) : 0.2 , 0.3 , and 0.5

Expectation

E (X) = ∑x P (x)

= 0 X 0.2 + 1 X 0.3 + 2 X 0.5

= 1.3

Expectation E (X) = 1.3

Expectation number of books a customer will purchase = 1.3