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Find the mean of the following frequency...

Find the mean of the following frequency distributions: Class interval:   0-10    10-20    20-30    30-40    40-50 Frequency:           9          12         15         10          14

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Knowledge Check

  • The median class in the following frequency distribution is {:("Class interval :",0-10,10-20,20-30,30-40,40-50),("Frequency :",12,13,25,20,10):}

    A
    `10-20`
    B
    `20-30`
    C
    `30-40`
    D
    none of these

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