1. Find value of `x` where Arithmetic mean`=4` for data `2,3,x,4,5`

Solution:
AM `=(2+3+x+4+5)/5`

`4=(2+3+x+4+5)/5`

`4xx5=14+x`

`x=20-14`

`x=6`

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2. Find value of `x` where Arithmetic mean`=5` for data `5,4,6,x,7,5`

Solution:
AM `=(5+4+6+x+7+5)/6`

`5=(5+4+6+x+7+5)/6`

`5xx6=27+x`

`x=30-27`

`x=3`

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3. Find value of `x` where Arithmetic mean`=4` for data `3,4,5,4,6,x,3`

Solution:
AM `=(3+4+5+4+6+x+3)/7`

`4=(3+4+5+4+6+x+3)/7`

`4xx7=25+x`

`x=28-25`

`x=3`

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4. Find value of `x` where Arithmetic mean`=16` for data `18,14,15,19,15,x,12,15,16`

Solution:
AM `=(18+14+15+19+15+x+12+15+16)/9`

`16=(18+14+15+19+15+x+12+15+16)/9`

`16xx9=124+x`

`x=144-124`

`x=20`

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