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09-12-2017
Mathematics

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Three of four numbers have a sum of 22. If the average of the four numbers is 8, what is the 4th number? A. 4 B. 6 C. 8 D. 10

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09-12-2017

the sum of three number is 22, the sum of four numbers is (8*4)=32, so the 4th number is 10

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