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Find the mean (bar(X)) if sumf(i)x(i)=75...

Find the mean `(bar(X))` if `sumf_(i)x_(i)=75andsumf_(i)=15`.

Text Solution

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The correct Answer is:
`(bar(X))=5`
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Knowledge Check

  • In the formula bar(x)=a+(sumf_(i)d_(i))/(sumf_(i)) for finding the mean of grouped data d_(i) 'S and deviation from a of

    A
    lower limits of the classes
    B
    upper limits of the classes
    C
    mid-points of the classes
    D
    frequencies of the class marks

  • In the formula bar(x)=a+h(sumf_(i)u_(i))/(sumf_(i)) for finding the mean of grouped frequency distribution u_(i) is equal to

    A
    `(x_(i)+a)/(h)`
    B
    `h(x_(i)-a)`
    C
    `(x_(i)-a)/(h)`
    D
    `(a-x_(i))/(h)`

  • The value of mean (bar(X)) is 41.6 and sumx_(i)f_(i)=1248 What is the value of N?

    A
    20
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    C
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    D
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