#### Question

If X ~ B (n, p) and E(X) = 12, Var(X) = 4, then the value of n is _______

(A) 3

(B) 48

(C) 18

(D) 36

#### Solution

E(X) = np and Var (X) = npq

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#### APPEARS IN

Solution If X ~ B (N, P) and E(X) = 12, Var(X) = 4, Then the Value of N Is__ Concept: Bernoulli Trials and Binomial Distribution - Calculation of Probabilities.