Comprehension Passage
Consider the following data for the next two (02) items that follow :
| Class | 0-30 | 30-60 | 60-90 | 90-120 |
| Frequency | 4 | 5 | 7 | 4 |
If the median (P) and mode (Q) satisfy the relation 7(Q - P) = 9R, then what is the value of R?
1
6
2
5
3
3
4
1