Solve the Problem. -Scores on a Test Are Approximately Normally Distributed with a Distributed

Multiple Choice

Solve the problem.
-Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students, B's to the next 25%, C's to the next
40%, D's to the next 16%, and F's to the bottom 9%. What is the bottom cutoff for a D grade? Round
Your answer to the nearest whole number.

A) 65
B) 58
C) 62
D) 56