Question

what number must be added to set of 6,16 and 8 to get an average of 13

Answer 1

Average of 4 numbers = 13 (Given)

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Find Sum of the 4 numbers:

Sum of the 4 numbers = 13 x 4 = 52

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Find the missing number:

52 - 6 - 16 - 8 = 22

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Answer: The number to be added is 22.