MCQ
$3.\overline{27}$ is:
- AAn integer.
- ✓A rational number.
- CA natural number.
- DAn irrational number.
$3.\overline{27}$ is a rational number.
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| Class interval | 0-5 | 5-10 | 10-15 | 15-20 | 20-25 |
| Frequency | 8 | 6 | $f$ | 4 | 3 |

| Life time (in hours) | 250-300 | 300-350 | 350-400 | 400-450 | 450-500 |
| Number of bulbs | 5 | 14 | 21 | 12 | 10 |