There are 10 railway stations between a station X and another station Y. Find the number of different tickets that must be printed so as to enable a passenger to travel from one station to any other.

There are 10 railway stations between a station X and another station

1.	There are 10 railway stations between a station X and another station Y. Find the number of different tickets that must be printed so as to enable a passenger to travel from one station to any other.
Answer» Including X and Y there are 12 stations. From any one station to any other, we need 11 different types of tickets . Since there are 12 stations , the different tickets possible are (12)(11)=132.

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There are 10 railway stations between a station X and another station Y. Find the number of different tickets that must be printed so as to enable a passenger to travel from one station to any other.

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