If X∼Binomial(n,p)X \sim \text{Binomial}(n, p)X∼Binomial(n,p), what is the coefficient of variation (CV=σμCV = \frac{\sigma}{\mu}CV=μσ)?
1−pnp\sqrt{\frac{1-p}{np}}np1−p
npnp(1−p)\frac{np}{\sqrt{np(1-p)}}np(1−p)np
np(1−p)\sqrt{np(1-p)}np(1−p)
1−pp\frac{1-p}{p}p1−p