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The following table shows marks secured ...

The following table shows marks secured by the students of a class in an examination in English:
`{:("Marks",0-10,10-20,20-30,30-40,40-50),("Number of Students"," "20," "24," "40," "36," "20):}`
Calculte mean marks using Short-cut Method.

Text Solution

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`(sumfd)/(sumf)=(120)/(140)=0.86`
`barX=A+(sumfd)/(sumf)`
`=25+0.86`
`=25.86`
Mean Marks = 25.86.
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TARUN JAIN & VK OHRI-MEASURES OF CENTRAL TENDENCY - ARITHMETIC MEAN-Illustration
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