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ICSE Class 7 Answered

the mean of 50 observation was 250 . later it was found out that the number 152 was wrongly copied as 102 for the computation of mean. find the correct mean
Asked by deepadevi1004 | 06 Feb, 2024, 09:00: PM
answered-by-expert Expert Answer

Incorrect Mean of 50 observations = 250

Then, the incorrect sum of 50 observations = 250 x 50 = 12,500

Now, correct sum = 12500 - 102 + 152 = 12550

Then, the correct mean of 50 observations img

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