Find the Standard Deviation $\sigma$ , for the Binomial Distribution Which Has the Stated Values

Multiple Choice

Find the standard deviation, $\sigma$ , for the binomial distribution which has the stated values of n and p. Round your answer to the nearest hundredth.
- $\mathrm { n } = 38 ; \mathrm { p } = 0.4$

A) $\sigma = 7.14$
B) $\sigma = 3.02$
C) $\sigma = 6.29$
D) $\sigma = 0.61$