There are 43 stations between Ernakulam and Chennai. How many second class tickets have to be printed, so that a passenger can travel from one station to any other station?	Choose the correct choice from the following options.
A) 1980
B) 1920
C) 1990
D) 1890
E) 1900
The total number of stations= 45   From 45 Stations we have to choose any two stations and the direction of travel (Ernakulam to Chennai is different from Chennai to Ernakulam) in 45P2 ways.   45P2= 45*44= 870   1980NSWER:1980
<result>A</result>
There are 43 stations between Ernakulam and Chennai. How many second class tickets have to be printed, so that a passenger can travel from one station to any other station?