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%, and C's to the
Next 42%. What is the bottom cutoff for a C grade? Round your answer to the nearest whole
Number.

A) 77
B) 68
C) 65
D) 63