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Q.
The mean of 100 observations is 40. It is found that an observation 84 was misread as 48. Then the correct mean is ?
A.
40.36
B.
41.24
C.
41.92
D.
42.05
View Answer
Correct choice: A
Explanation:
Given, mean of 100 observations is 40 => Total of 100 observations = 40 x 100 = 4000 84 is misread as 48 => Difference = 84 - 48 = 36 => Now, new total of 100 observations = 4000 + 36 = 4036 Correct Mean = 4036/100 = 40.36
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