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Suppose that the final grades in a stats course are approximately Normally distributed, with an average grade of 83 and a SD of 5. A

Suppose that the final grades in a stats course are approximately Normally distributed, with an average grade of 83 and a SD of 5. A student is randomly selected.

a.) what is the probability that the selected student received an A (at least 90)?

b.) the students know that their final grade is at the 81st percentile. Show whether or not that students grade is an A.

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