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OpenStudy (anonymous):
on four exams, Wallace Memmer's grades were 79, 93, 92, and 68. What grade must he obtain on his fifth exam to have an 80 average?
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OpenStudy (anonymous):
what is the average of a population?
OpenStudy (anonymous):
average=grades on first exam+grade on 2nd exam+...+5th exam/number of exams
OpenStudy (anonymous):
Thank you
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