The marks of 200 students in a test were recorded as follows:
| Marks % | 10-19 | 20-29 | 30-39 | 40-49 | 50-59 | 60-69 | 70-79 | 80-89 |
| No. of students | 7 | 11 | 20 | 46 | 57 | 37 | 15 | 7 |
Solution:
The cumulative frequency table is as follows:
| Marks % (Class) | Frequency | Cumulative Frequency |
| 10-19 | 7 | 7 |
| 20-29 | 11 | 18 |
| 30-39 | 20 | 38 |
| 40-49 | 46 | 84 |
| 50-59 | 57 | 141 |
| 60-69 | 37 | 178 |
| 70-79 | 15 | 193 |
| 80-89 | 7 | 200 |
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