Find the Standard Deviation of the Random Variable $0,1,2,3$ , and 4 Defective Computers Are

Multiple Choice

Find the standard deviation of the random variable.
-The probabilities that a batch of 4 computers will contain $0,1,2,3$ , and 4 defective computers are $0.5997,0.3271,0.0669,0.0061$ , and $0.0002$ , respectively. Round the answer to two decimal places.

A) $0.59$
B) $0.65$
C) $0.42$
D) $0.81$