Correct Answer - Option 3 : 0.12

**Concept:**

Coefficient of variation = \(\rm \frac{\sigma _{x}}{\bar{x}}\)

Where,

\(\rm \sigma _{x}\) = Standard Deviation

\(\rm \bar{x}\) = Mean of the observations

**Calculation:**

Coefficient of variation = \(\rm \frac{17.4}{148}\)

**∴ Coefficient of variation is 0.12**