The route taken by a bus from Delhi to Jaipur has ‘n’ stops,
including the source and the destination. When ‘m’ new stops are added
on the route of the bus (where m > 1) the number of different tickets
that can be issued between two stops on the route increases by 11. What
is the value of ‘n’?

1) 6
2) 4
3) 7
4) 5