Mathematics
The heart of 60 patients were examined through X-ray and the observations obtained are given below :
| Diameter of heart (in mm) | Number of patients |
|---|---|
| 120 | 7 |
| 121 | 9 |
| 122 | 15 |
| 123 | 12 |
| 124 | 6 |
| 125 | 11 |
Find the median.
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