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An instructor gives a 100-point examination in which the grades are normally distributed. The mean is...

An instructor gives a 100-point examination in which the grades are normally distributed. The mean is 73 and the standard deviation is 13. If there are 5% A's and 5% F's, 15% B's and 15% D's, and 60% C's, find the scores that divide the distribution into those categories. Round the cutoff scored to the nearest whole number. Round intermediate z-values to 2 decimal places.

A: ___ - ___

B: ___-___

C: ___-___

D: ___-___

F: ___-___

Math   Statistics-And-Probability   
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