A quiz consists of 930 true or false questions. If the student guesses on each question, what is the standard deviation of the number of correct answers?

A) 15.2479507

B) 2

C) 0

D) 21.5638587

A quiz consists of 930 true or false questions. If the student guesses on each question, what is the standard deviation of the number of correct answers?

A) 15.2479507

B) 2

C) 0

D) 21.5638587