Chapter Five

a. P(exactly 3) = P(x = 3) = b. P(at most 1) = c. P(exactly 4) = P(x = 4) = Let x denote the number of corporations in the random sample of 5 that provide retirement benefits. Then x is a hypergeometric random variable with N = 20, r = 14, and n = 5. a. P(exactly 2) = P(x = 2) = b. P(none) = c. P(at most one) = = .0004 + .0135 = .0139 ................
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