Mathematics
Mathematics
Problem
The following table shows the cumulative frequencies of marks obtained by 50 students in a test.| Marks (class interval) | Cumulative frequency |
|---|---|
| 20–30 | 8 |
| 30–40 | 20 |
| 40–50 | 36 |
| 50–60 | 47 |
| 60–70 | 50 |
Mathematics
| Marks (class interval) | Cumulative frequency |
|---|---|
| 20–30 | 8 |
| 30–40 | 20 |
| 40–50 | 36 |
| 50–60 | 47 |
| 60–70 | 50 |