if the mean of the following data is 20.2 , find the value of p. x 10,15,20,25,30 and f is 6 , 8 ,p ,10,6
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mean of data =sum of x/sum of f
20.2=10+15+20+25+30/6+8+10+6+p
20.2=100/30+p
20.2×(30+p)=100
606+20.2p=100
20.2p=100-606
20.2p=394
p=394/20.2
p=19.50
20.2=10+15+20+25+30/6+8+10+6+p
20.2=100/30+p
20.2×(30+p)=100
606+20.2p=100
20.2p=100-606
20.2p=394
p=394/20.2
p=19.50
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