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प्रश्न
The age of teachers of a school are recorded below.
| Age (in years) | 20 - 30 | 30 - 40 | 40 - 50 | 50 - 60 | 60 - 70 |
| No. of teachers | 6 | 8 | 12 | 10 | 5 |
Draw a frequency polygon on the graph.
आलेख
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उत्तर
| Class | 20 - 30 | 30 - 40 | 40 - 50 | 50 - 60 | 60 - 70 |
| Mid-value | 25 | 35 | 45 | 55 | 65 |
| Frequency | 6 | 8 | 12 | 10 | 5 |

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