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If 5 scores average 80, their sum is 400.

If 6 scores average 83, their sum will be 498.

The sixth score must be (498 - 400) = 98% .

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โˆ™ 2010-09-01 20:53:31
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Q: 5 test scores average 80 percent and What does the 6th quiz score have to be to raise the average to 83 percent?
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