Answers

2016-04-07T19:00:56+05:30
 X= 10,15,20,25,30      f=6,8,p,10,6
fixi = 60,120,20p,250,180
∑fixi= 610+20p
∑fi = 30+p
mean = 20.2

20.2=610+20p/30+p
606+20.2p=610+20p
20.2p-20p =610-606
0.2p = 4
p= 20

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