Question

From the following frequency distribution find the coefficient of variation.

| Marks | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |
| No.of students | 5 | 12 | 25 | 10 | 8 |

Answer 1

Let X (Cl) and f be the marks and number of students

Coefficient of variation: C.V = (σ/X * 100)