For a binominal variate X with n = 6 if P(X = 4) = 135 2^ 12 then its variance is

MHT CET 2023 Mathematics question

For a binominal variate X with n = 6 if then its variance is

Answer: (D)

, so and . Trying : , which fits (the cubic factors as , and the other positive root is irrational and gives

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Question ID VK-095357