1. Find value of `X` where Arithmetic mean `= 3.5` for data `2,3,X,5`
AM `= ( 2 + 3 + X + 5 )/4`
`3.5 = ( 2 + 3 + X + 5 )/4`
`3.5 × 4 = 10 + X`
`X = 14 - 10`
`X = 4`
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`
`5 xx 6=27+x`
`x=30 - 27`
`x=3`
This material is intended as a summary. Use your textbook for detail explanation.
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