CBSE Class 10 Maths (Standard) 2022 · Paper 30/2/1 · Question 9(a)
The mean of the following frequency distribution is 25. Find the value of .
| Class | Frequency |
|---|---|
| 0 - 10 | 5 |
| 10 - 20 | 18 |
| 20 - 30 | 15 |
| 30 - 40 | |
| 40 - 50 | 6 |
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