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Calculate mean from the following data: ...

Calculate mean from the following data:
`{:("Marks",10-20,10-30,10-40,10-50,10-60,10-70,10-80,10-90),("Number of Students"," "4," "16," "56," "97," "124," "137," "146," "150):}`

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Verified by Experts

The given data is in cumulative frequency form. It should first be converted into simple frequency.

Mean, `barX=A+(sum fd')/(sumf)xxC`
`=45+20/150xx 10`
`=45+1.33=46.33`
Thus, Mean Marks = 46.33.
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Determine median value of the following series using graphic method : {:("Marks",0-5,5-10,10-15,15-20,20-25,25-30,30-35,35-40),("Number of students"," "4," "6," "10," "10," "22," "25," "18," "5):}

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