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GRE

A data set has a mean of 24 and consists of 5 numbers. If 4 of the numbers are 39, 19, 15, 15, what is the remaining number?

Correct answer

A. 32

Explanation

Sum of all 5 numbers = mean × count = 24 × 5 = 120. Sum of the known numbers = 88. Remaining number = 120 - 88 = 32.

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