The modal class of the following frequency distribution is
The modal class of the following frequency distribution is
| Class interval | Frequency |
| 10 – 20 | 4 |
| 20 – 30 | 9 |
| 30 – 40 | 12 |
| 40 – 50 | 15 |
| 50 – 60 | 8 |
| 60 – 70 | 2 |
A) 30 – 40
B) 40 – 50
C) 50 – 60
D) 20- 30
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