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Average of five numbers is 82 so their sum is 82*5 = 410.

Average of four of them is 80, so their sum is 80*4 = 320.

So the fifth number is 410 - 320 = 90.

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โˆ™ 2009-10-13 15:04:47
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Q: The average of 5 numbers is 82 The average of 4 of the numbers is 80 what is the fifth numbers?
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