Suppose that the probabilities of a customer purchasing 0, 1, or 2 books at a book store are 0.4, 0.2, and 0.4, respectively
. What is the expected number of books a customer will purchase?
1 answer:
Answer:
Expected number of books = 1.0
Step-by-step explanation:
Expected number of books, E(x) = ∑xp(x)
∑ = Summation
x = books
p(x) = probability of purchasing a book
E(x) = (0*0.4) + (1*0.2) + (2*0.4)
E(x) = 0 + 0.2 + 0.8 = 1.0
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