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Find the mean of the following distribut...

Find the mean of the following distribution: x:           10               30               50               70               89 f:            7                 8                 10               15               10

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`Mean =(sum(xi*fi))/(sum(fi))`
`Mean= (10*7+ 30*8+ 50*10+ 70*15+89*10)/(7+8+10+15+10)` `Mean= 2750/50=55`
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