Question

The coefficient of variance is $60$ and standard deviation is $24,$ then Arithmatic mean is

• A. $40$
• B. $\frac{7}{20}$
• C. $\frac{20}{7}$
• D. $\frac{1}{40}$

Answer 1

The correct option is A $40$

We know that coefficient of variance $=\frac{\sigma }{\overline{x}}\times 100$
$\Rightarrow \frac{\sigma }{\overline{x}}\times 100=60$
$\Rightarrow \overline{x}=\frac{24\times 100}{60}=40$