Construct a cumulative distribution of less than type for the following data.
| Class interval | Cumulative frequency |
| More than or equal to 10 | 57 |
| More than or equal to 20 | 51 |
| More than or equal to 30 | 43 |
| More than or equal to 40 | 27 |
| More than or equal to 50 | 21 |
| More than or equal to 60 | 17 |
Answer:
| Class interval | Cumulative Frequency |
| less than 20 | |
| less than 30 | |
| less than 40 | |
| less than 50 | |
| less than 60 | |
| less than 70 |