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Find missing frequency, {18,14,15,19,15,a,12,15,16},mean=16

Solution:
Your problem `->` missing frequency, {18,14,15,19,15,a,12,15,16},mean=16


Here `18,14,15,19,15,a,12,15,16`

Here Mean `bar x = 16` and `n = 9`

`sum x = 18 + 14 + 15 + 19 + 15 + a + 12 + 15 + 16`

`=a + 124`

Mean `bar x = (sum x)/n`

`16 = (a + 124)/9`

`144 = a + 124`

`a = 144 - 124`

`a = 20`








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