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Find the mean salary of 60 workers of a ...

Find the mean salary of 60 workers of a factory from the following table

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`{(x_i,fi,x_i fi),(3000,16,48000),(4000,12,48000),(5000,10,50000),(6000,8,48000),(7000,6,42000),(8000,4,32000),(9000,3,27000),(10000,1,10000),(,sumf_i=60,sumf_i*x_i=305000):}`


`"(a.) Using Direct Method"`
`barx=(sumf_i*x_i)/(sumf_i) = 305000/60 = 5083.33`

`"Thus the required mean is 5083.33 "`
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