Question

. If the arithmetic mean of 6, 8, 10, x, 7 is 8, the value of x will be—

Answer 1

9.
(6+8+10+x+7) divided by 5 = 8
Therefore 31+x = 40 by cross multiplication
Hence on solving, x = 9

Answer 2

Answer:

Value of x = 9

Step-by-step explanation:

Given mean of 6,8,10,x,7 is 8

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We know that,

$\boxed {Mean(x)\\=\frac{Sum\:of\: observations}{Number\:of\:observations}}$

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$mean=8$

$\implies \frac{6+8+10+x+7}{5}=8$

$\implies \frac{31+x}{5}=8$

$\implies 31+x=40$

$\implies x = 40-31$

$\implies x = 9$

Therefore,

Value of x = 9

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