Question
A bullet train carrying some passengers arrived at Station Y. At Station Y, only 55 passengers boarded the bullet train. It then left for Station Z. At Station Z, only 24 passengers alighted from the bullet train. When the bullet train left Station Z, there were 47 passengers on it. How many passengers were there on the bullet train when it first arrived at Station Y?
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A bullet train carrying some passengers arrived at Station Y. At Station Y, only 55 passengers boarded the bullet train. It then left for Station Z. At Station Z, only 24 passengers alighted from the bullet train. When the bullet train left Station Z, there were 47 passengers on it. How many passengers were there on the bullet train when it first arrived at Station Y?