Question

If the coefficient of variation of a collection of data is 57 and its S.D. is 6.84, then find the mean.

Answer 1

$\text{Coefficient of variation}=\frac{S.D}{Mean}\times 100$
$\Rightarrow 57=\frac{6.84}{Mean}\times 100$

$\Rightarrow mean=\frac{684}{57}$
$\Rightarrow mean=12$