Question

if the arithmetic mean of 5 8 6 7 x and 4 is 6 then the value of x is

Answer 1

Arithmetic Mean
$= \frac{Sum \: of \: Observations}{Total \:no.of \: Observtions} \\ = \frac{5 + 8 + 6 + 7 + x + 4}{6} = 6 \\ = > 5 + 8 + 6 + 7 + x + 4 = 6 \times 6 \\ = > 13 + 13 + x + 4 = 36 \\ = > x + 4 = 36 - 26 \\ = > x = 10 - 4 \\ = > x = 6$



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