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Get Answers to all your Questions
The mean of 40 observations was 160. It was detected that the value of 165 was wrongly copied as 125. Find the correct mean.
Answers (1)
Mean (average) of 40 observations=160
Total sum (incorrect) of 40 observations= = 6400
Since, 165 was wrongly copied as 125
Correct sum of 40 observations = 6400-125-165=6440
Correct mean=
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