CAT 2025 Slot 1 · DILR · Question 5
CAT 2025 Slot 1 previous year question on Quant Based Puzzles and Optimisation, with the answer and a step-by-step solution.
Set 1: Train Occupancy, Stations A to E — this question belongs to a set. Read the full set with all 5 questions →
A train travels from Station A to Station E, passing through stations B, C, and D, in that order. The train has a seating capacity of 200. A ticket may be booked from any station to any other station ahead on the route, but not to any earlier station.
A ticket from one station to another reserves one seat on every intermediate segment of the route. For example, a ticket from B to E reserves a seat in the intermediate segments B – C, C – D, and D – E.
The occupancy factor for a segment is the total number of seats reserved in the segment as a percentage of the seating capacity. The total number of seats reserved for any segment cannot exceed 200.
The following information is known.
Segment C – D had an occupancy factor of 95%. Only segment B – C had a higher occupancy factor.
Exactly 40 tickets were booked from B to C and 30 tickets were booked from B to E.
Among the seats reserved on segment D – E, exactly four-sevenths were from stations before C.
The number of tickets booked from A to C was equal to that booked from A to E, and it was higher than that from B to E.
No tickets were booked from A to B, from B to D and from D to E.
The number of tickets booked for any segment was a multiple of 10.
Answer & solution
Answer: 60
A ticket spans exactly one segment when it runs between consecutive stations.
The four such types are A–B, B–C, C–D and D–E.
Clue 5 sets both A–B and D–E to zero.
Clue 2 gives B–C as 40.
The C–D count was found to be 20 while solving the 190-seat equation for segment C – D.
So the single-segment tickets number 0+40+20+0=60.
Shortcut. Of the four consecutive-station journeys, clue 5 kills two outright and clue 2 hands over a third. Only the C–D figure needs to be worked out, so this question is almost free once the grid is built.
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