If X∼Binomial(n,p)X \sim \text{Binomial}(n, p)X∼Binomial(n,p), what is the formula for the variance Var(X)Var(X)Var(X)?
npnpnp
np(1−p)np(1-p)np(1−p)
np(1−p)\sqrt{np(1-p)}np(1−p)
n2p(1−p)n^2 p(1-p)n2p(1−p)