Mathematics
For the following distribution, the upper quartile is :
| Number | Frequency |
|---|---|
| 20 | 1 |
| 25 | 2 |
| 30 | 5 |
| 35 | 6 |
| 40 | 3 |
| 45 | 2 |
| 50 | 1 |
35
30
45
40
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