Maths Class 10 Term 2, Answer to the Question : The mean of the following frequency distribution is 25. Find the value of f.
| Class : | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |
| Frequency : | 5 | 18 | 15 | f | 6 |
| Class : | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |
| Frequency : | 5 | 18 | 15 | f | 6 |
