| Class Interval | Frequency |
| 0 ? 10 | 7 |
| 10 ? 20 | 8 |
| 20 ? 30 | 12 |
| 30 - 40 | 13 |
| 40 ? 50 | 10 |
A) 25.6
B) 27.2
C) 23.3
D) 24.5
E) None of these
Correct Answer: B
Solution :
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