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Find the mean of the following distribut...

Find the mean of the following distribution: x: 4 6 9 10 15 f: 5 10 10 7 8

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Solution
For calculating,
Mean `= sumx_if_i`/`sumf_i`
`=>(5xx 4)+(6 xx 8)+(7 xx 14)+(8 xx 11)+(9 xx 3)/4+8+14+11+3`
Sum equals
`20+48+98+88+27/4+8+14+11+3=7.025`
Hence the required mean is `7.02`
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