There are 4 buses A, B, C and D each bus has 120 seats consisting of the aisle, mid and front seats. The number of seats of each type is equal. In these seats some are filled and some vacant.

1. In bus A the number of filled seats in the aisle is 10 more than the vacant seats. The ratio of filled and vacant seats in mid-row is 5 ∶ 3. The front seats in Bus A is 70% filled.

2. In bus C the front seat filled is 25% more than the number of filled seats in the front row of Bus A and ratio of filled seats between aisle seats of Bus A and Bus C is 5 ∶ 7. The number of vacant seats and filled seats of mid-row is same in Bus C

3. In bus B 60% front seat is vacant and 30% of the aisle seats are empty. Mid seats filled in bus B is 50% more than the filled seats of the aisle in Bus D. The ratio between vacant and filled of mid seats in Bus D is 1 ∶ 3. 45% seats of front in Bus D is vacant. Number of vacant aisle seats in bus D is 32.