In Problems 27-30 suppose that, for a certain exam, a teacher grades on a curve. It is

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In Problems 27-30 suppose that, for a certain exam, a teacher grades on a curve. It is known that the mean is 50 and the standard deviation is 5.

There are 45 students in the class.

a. How many students should receive a C?

b. How many students should receive an A?

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