Mathematics
Find the mean of the following frequency distribution using step-deviation method.
Take assumed mean = 28
| Class interval | Frequency |
|---|---|
| 0 - 8 | 10 |
| 8 - 16 | 20 |
| 16 - 24 | 14 |
| 24 - 32 | 16 |
| 32 - 40 | 18 |
| 40 - 48 | 22 |
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