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Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 5. ( use formula) a.What

Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 5. ( use formula)

a.What is the probability that a randomly selected exam will have a score of at least 71?

b.What percentage of exams will have scores between 89 and 92?

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