It is a small town railway station and there are 25 stations on the line.At each of the 25 stations the passengers can get tickets for any of the other 24 stations. How many different kinds of tickets do you think the booking clerk has to keep?

• 24,because At each of the 25 stations the passengers can get tickets for any of the other 24 stations.
  
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• At each station passengers can get tickets for any of the other 24 stations and,therefore the number of tickets required is 25 x 24 = 600.
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• 25 station are in the line ...so every station will keep 24 tickets with them
  25*24=600
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• 300. By the formula n(n-1)/2
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• It would be 24! or if returning tickets between same station are considering different then 2×24!
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