• 2021 December(E23) Math Question 29

    Statistics

    - Mean, Median

    Statistics (Mean, Median, Mode, Standard Deviation)
    Choice D

    Let m be the mean, then:

    Sum=7mSum=7m

    then by increasing the mean by 7:

    New  sum=7(m+4)New\; sum=7(m+4)
    =7m+28=7m+28
    =Sum+28=Sum+28

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