The A.M of 75 items was calculated as 46.Later on it was found the two numbers wew misread as 21 and 29 instead of 12 and 92.Find the correc

Question

The A.M of 75 items was calculated as 46.Later on it was found the two numbers wew misread as 21 and 29 instead of 12 and 92.Find the correct Arthimetic mean.

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Sarah 4 weeks 2021-11-06T08:36:28+00:00 1 Answer 0 views 0

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    2021-11-06T08:38:16+00:00

    Answer:

    Number of observations= 75

    Mean=27

    Sum of observations=75×27

    Wrong value=43, Correct value=53

    ∴Correct sum=75×27−43+53

    =75×27+10

    Correct mean=

    75

    75×27+10

    =27+

    75

    10

    =27.133

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