If X∼Binomial(n,p)X \sim Binomial(n, p)X∼Binomial(n,p), what is the coefficient of variation CV=σμCV = \frac{\sigma}{\mu}CV=μσ in terms of nnn and ppp?
1−pnp\sqrt{\frac{1-p}{np}}np1−p
pn(1−p)\sqrt{\frac{p}{n(1-p)}}n(1−p)p
1−pnp\frac{1-p}{np}np1−p
np(1−p)\sqrt{np(1-p)}np(1−p)