A train starts from station 'A' with some passengers. At station 'B', 50% of the passengers get down and 25 new get in. At station 'C', 40% of the passengers present in the train get down and 40 new get in. Now, the number of passengers present in train is 40% of those boarded at station 'A'. How many passengers got down at station 'B'?

Correct answer: C