There are 24 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 answers: A) 800 B) 820 C) 650 D) 870 E) 900
The total number of stations= 26   From 26 Stations we have to choose any two stations and the direction of travel (Ernakulam to Chennai is different from Chennai to Ernakulam) in 26P2 ways.   26P2= 26*25= 
<gadget id="calculator">26*25</gadget>
<output>650</output>
650   ANSWER:650
<result>C</result>
There are 24 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?