It a Recent Study of College Students Indicated That 30

Multiple Choice

It a recent study of college students indicated that 30% of all college students had at least one tattoo. A small private college decided to randomly and independently sample 15 of their students
And ask if they have a tattoo. Find the standard deviation for this binomial random variable.
Round to the nearest hundredth when necessary.

A) 4.5
B) 3.15
C) 10.5
D) 1.77