Question

If the airthmetic mean of 6,8,5,7,x and 4 is 7,then find the valve of x.

Answer 1

arithmetic mean=sum of observations/no of observations
given observations=6,8,5,7,x,4
mean=7
7=[6+8+5+7+4+x]/6
7*6=30x
42=30x
x=42/30
x=7/5

Answer 2

Answer:

$Value\: of\: x = 12$

Step-by-step explanation:

$Given\: arithmetic \: mean \: of \\\: 6,8,5,7,x \:and \:4 \:is \:7$

\* we know that ,

$\boxed {mean \\= \frac{Sum \: of \: the \: observations }{Number \: of \: observations }}$*/

$\implies Mean = 7$\*given *\

$\implies \frac{6+8+5+7+x+4}{6}=7$

$\implies \frac{30+x}{6}=7$

$\implies 30+x=42$

$\implies x = 42-30$

$\implies x = 12$

Therefore,

$Value\: of\: x = 12$

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