The mean of 50 observations was 36. It was found later that an observation 48 w

Question

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:

Options:

A . 35.2

B . 36.1

C . 36.5

D . 39.1

Answer: Option C

Correct sum = (36 * 50 + 48 - 23) = 1825.
Correct mean = 1825/50 = 36.5

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