Correct Answer - Option 3 : 20

Given:

Coefficient of variation (CV) is 20

Variance is 16

**Concept**

The coefficient of variation (CV) is defined as the ratio of the standard deviation $σ$ to the mean $μ$

CV = \(\rm \rm \frac{\sigma }{\mu }\) × 100

__Calculation:__

Standard deviation (σ) = 4

⇒ CV = \(\rm \frac{\sigma }{\mu }\) × 100

⇒ 20 = \(\rm \frac{4}{\mu }\) × 100

$⇒ μ = 20$

**∴ The arithmetic mean is: 20**