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By Wiki Arithmetic Mcqs Average Mcqs Basic Maths Mcqs Mathematics Mcqs No Comments

The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is___________?

A. 35.2
B. 36.1
C. 36.5
D. 39.1

Explanation:

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Correct sum = (36 * 50 + 48 – 23) = 1825.

Correct mean = 1825/50 = 36.5

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