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FindthemeanIf the meanMarksNo. of studentsof the following data is 20.2, then find the value of p15302510206106Statistic |
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Answer» f)=6,8,p,10,6 x)=10,15,20,25,30also mean=20.2so,∑fixi/∑fi=20.2 now,∑fixi=(10*6)+(15*8)+(20*p)+(25*10+)(30*6) =610+20pnow∑fi=6+8+p+10+6 =30+p ∑fixi/∑fi=20.2 610+20p/30+p=20.2 20.2(30+p)=610+20p 606+20.2p=610+20p 20.2p-20p=610-606 0.2p=4 p=4/0.2 p=20 thx |
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