MHT CET 2023 Mathematics question

Two cards are drawn successively with replacement from a well shuffled pack of 52 cards, then mean of number of queens is

(A)
(B)
(C)Correct
(D)

Answer: (C)

Solution

Let X be the number of queens in two draws with replacement. Each draw is an independent Bernoulli trial with success probability , so X is binomial with , . Mean , option (c). Directly: ,

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Question ID VK-094650