Solve this:
QEXAMPLE. Compute the median for the following cumulative frequency distribution :
| Less than 20 | Less than 30 | Less than 40 | Less than 50 | Less than 60 | Less than 70 | Less than 80 | Less than 90 | Less than 100 |
| 0 | 4 | 16 | 30 | 46 | 66 | 82 | 92 | 100 |
