A data set has a mean of 22 and consists of 4 numbers. If 3 of the numbers are 28, 26, 30, what is the remaining number?

Correct answer

A. 4

Explanation

Sum of all 4 numbers = mean × count = 22 × 4 = 88. Sum of the known numbers = 84. Remaining number = 88 - 84 = 4.

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