Question: The final marks in a statistics course are normally distributed with a mean of 70 and a standard deviation of 10. The professor must convert

The final marks in a statistics course are normally distributed with a mean of 70 and a standard deviation of 10. The professor must convert all marks to letter grades. She decides that she wants 10% A’s, 30% B’s, 40% C’s, 15% D’s, and 5% F’s.

Determine the cutoffs for each letter grade.

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