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What is the average of all positive two-digit multiples of 7?

 Sep 22, 2020
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sum(14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98) = 728 / 13 = 56 - average of all 2-digit multiples of 7.

 Sep 22, 2020

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