SOLUTION: Axel received 73, 85, 79, and 90 on four of five exams. What must she get on her fifth exam if she wants her total exam average to be between 80 and 90?

Question 424688: Axel received 73, 85, 79, and 90 on four of five exams. What must she get on her fifth exam if she wants her total exam average to be between 80 and 90?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Axel received 73, 85, 79, and 90 on four of five exams. What must she get on her fifth exam if she wants her total exam average to be between 80 and 90?
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Let the 5th score be "x".
Average of the 5 scores is (73+85+79+90+x)/5 = (327+x)/5
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Solve for "x" if:
80 < (327+x)/5 < 90
400 < 327+x < 450
73 < x < 113
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Cheers,
Stan H.
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