A delivery of N televisions contains M B-grade devices. To estimate the share of Bgrade televisions in

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A delivery of N televisions contains M B-grade devices. To estimate the share of Bgrade televisions in the batch, a sample n is taken.

(a) What is the distribution of B-grade televisions if each unit is immediately returned after being selected?

(b) What is the distribution of B-grade television if the units are not returned after being selected?

(c) What is the probability when selecting a sample without the units being replaced that N = 15, M = 5, and n = 3 includes more than one B-grade television?

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