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___________? - IQ786

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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___________?

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___________?

36.2

36.1

36.5

36.7

36.8

Explanation

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

Correct mean = 1825/50 = 36.5