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20-02-2020
Mathematics

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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?

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20-02-2020

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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