Which of these represents the variance of a Binomial random variable X∼Binomial(n,p)X \sim Binomial(n, p)X∼Binomial(n,p)?
np(1−p)np(1-p)np(1−p)
npnpnp
np(1−p)\sqrt{np(1-p)}np(1−p)
p(1−p)p(1-p)p(1−p)