Question

Mean value of weekly income of 40 families is 265 but in
calculation income of one family was read as 150 instead of 115
find corrected mean​

Answer 1

Explanation:

Wrongly stipulated sum was 265 x 40= 10600

Wrongly stipulated sum was 265 x 40= 10600Subtract the wrong value and add the correct income value to get the correct sum

Wrongly stipulated sum was 265 x 40= 10600Subtract the wrong value and add the correct income value to get the correct sumCorrect sum= 10600- 150+ 115 = 10565

Wrongly stipulated sum was 265 x 40= 10600Subtract the wrong value and add the correct income value to get the correct sumCorrect sum= 10600- 150+ 115 = 10565Correct mean= 10565/40= 264.125

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