MHT CET 2023 Mathematics question

Mathematics Statistics MHT CET 2023

A random variable X assumes values 1, 2, 3, ....., n with equal probabilities, if var(X) = E(X), then n is

(A)4
(B)5
(C)7Correct
(D)9

Answer: (C)

Solution

Each value has probability . . , so .

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Question ID VK-094652