THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING:
A company hires management trainees for entry level sales positions.Past experience indicates that only 10% will still be employed at the end of nine months.Assume the company recently hired six trainees.
-What is the standard deviation of the number of trainees that will still be employed at the end of nine months?

A) 0.540
B) 0.240
C) 0.735
D) 0.490