## Task 5 - 010615

How many different types of second-class passenger train tickets are needed for a route with 15 stations, if there should be a ticket for every possible connection?

How did you determine the number?


Since it makes a difference whether you travel from place A to place B or in the opposite direction from B to A, you need 14 tickets to the other stations from each station, i.e., a total of $15 \cdot 14=210$ tickets.