A data set has a mean of 33 and consists of 4 numbers. If 3 of the numbers are 37, 33, 23, what is the remaining number?

Correct answer

D. 39

Explanation

Sum of all 4 numbers = mean × count = 33 × 4 = 132. Sum of the known numbers = 93. Remaining number = 132 - 93 = 39.

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