alleryStart learning →A Binomial(n, p) random variable has mean and variance
An and n(1 − p)
Bnp and np(1 − p)
Cn + p and np
Dp and p(1 − p)
Answer & Solution
Correct answer: B. np and np(1 − p)
Binomial(n, p) = sum of n iid Bernoulli(p).
Mean = np by linearity; variance = np(1 − p) by independence.
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