What is the variance of a Binomial distribution X∼Binomial(n,p)X \sim \text{Binomial}(n, p)X∼Binomial(n,p)?
npnpnp
np(1−p)np(1-p)np(1−p)
npqnpqnpq
n2p(1−p)n^2p(1-p)n2p(1−p)