Question: Let S = {1, 2, . . . , n} and suppose that A and B are, independently, equally likely to be any of the

Let S = {1, 2, . . . , n} and suppose that A and B are, independently, equally likely to be any of the 2n subsets (including the null set and S itself) of S.
(a) Show that

Let N(B) denote the number of elements in B. Use

(b) Show that

PA cm-()

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