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