A data set has a mean of 23 and consists of 5 numbers. If 4 of the numbers are 17, 25, 14, 9, what is the remaining number?

Correct answer

B. 50

Explanation

Sum of all 5 numbers = mean × count = 23 × 5 = 115. Sum of the known numbers = 65. Remaining number = 115 - 65 = 50.

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