Mathematics
The following table shows the distribution of the marks obtained by 50 students in an aptitude test.
| Marks obtained | No. of students |
|---|---|
| 15 | 6 |
| 18 | 18 |
| 21 | 12 |
| 24 | 8 |
| 27 | 4 |
| 30 | 2 |
Find the mean, the median and the mode of the distribution.
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