An Instructor Has Given His Final Exam,and Scores Are Approximately

Multiple Choice

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows:
= 85,
S² = 36.Approximately what percentage of scores falls at or between Nancy's and Ronald's scores?

A) 75%
B) 35%
C) 11%
D) 50%