Adam Scored 60 on His Final Exam

Multiple Choice

Adam scored 60 on his final exam.His class's average score was 50, with a standard deviation of 10.How many standard deviations is Adam's score from the mean?

A) 1 standard deviation above the mean
B) 1 standard deviation below the mean
C) 2 standard deviations above the mean
D) 2 standard deviations below the mean