Mathematics
Calculate the mean mark in the distribution given below :
| Marks | Frequency |
|---|---|
| 1 - 10 | 7 |
| 11 - 20 | 9 |
| 21 - 30 | 15 |
| 31 - 40 | 8 |
| 41 - 50 | 6 |
| 51 - 60 | 5 |
Also state :
(i) the median class
(ii) the modal class
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