CBSE Class 10 Maths (Basic) 2022 · Paper 430/6/1 · Question 6
If the mean of the following frequency distribution is , find the missing frequency .
| Marks | Number of Students |
|---|---|
| 0 - 10 | 15 |
| 10 - 20 | 20 |
| 20 - 30 | 35 |
| 30 - 40 | k |
| 40 - 50 | 10 |
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