The mean and standard deviation of scores on an accounting exam are 74 and 8, respectively. The mean and standard deviation of scores on a marketing…

The mean and standard deviation of scores on an accounting exam are 74 and 8, respectively. The mean and standard deviation of scores on a marketing exam are 78 and 10, respectively.
Find the z-scores of a student who scores 90 in both classes. In which test did the student fare better?
What percentage of students scored within 58 and 90 on the accounting exam?

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