if the mean of the following data is 20.2 , find the value of p:
x 10 15 20 25 30
f 6. 8. p. 10. 6
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X= 10,15,20,25,30
1=6,8.P,10,6
Fixi = 60,120,20p,250,180
>Fixi= 610+20p
Ffi = 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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1=6,8.P,10,6
Fixi = 60,120,20p,250,180
>Fixi= 610+20p
Ffi = 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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