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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

Question 138

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
The time it takes to assemble an electronic component is normally distributed with a mean of 17.2 minutes and a standard deviation of 3.1 minutes.
-The median score for the final exam in a statistics class was 85 and 20 percent of the students received a grade greater than 90.What is the probability that a randomly selected exam had a score between 85 and 90?


A) 80 percent
B) 30 percent
C) 50 percent
D) There is not sufficient information to answer this question.

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