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?