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:

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

Correct mean = 1825/50 = 36.5