Ratio of the railway fares of airconditioned and ordinary sleeper classes = 4 : 1 Ratio of the corresponding number of passengers = 3 : 25 Corresponding compound ratio = 4 × 3 : 1 × 25 = 12 : 25 Sum of the terms of ratio = 12 + 25 = 37 ∴ Total fare of the passengers of airconditioned sleeper classes = Rs. (