The mean of 15 observations is 40. It was found that an observation 23 was wrongly recorded as 32. The correct mean is: MCQ with Answer and Explanation

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The mean of 15 observations is 40. It was found that an observation 23 was wrongly recorded as 32. The correct mean is:

A. 40.6

B. 41.2

C. 39.4

D. 38.5

Answer: Option C

Solution (By JKSSB Mock Tests)

Correct sum = 15 × 40 - 32 + 23 = 600 - 9 = 591. Correct mean = 591/15 = 39.4.

This question belongs to: Accountancy and Statistics Statistics

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