There are 13 stations between Hyderabad and Bangalore. How many second class tickets have to be printed, so that a passenger can travel from any station to any other station? Choose the correct choice from the following answers
A) 288 B) 267 C) 261 D) 211 E) 210
The total number of stations = 15   From 15 stations we have to choose any two stations and the direction of travel (i.e., Hyderabad to Bangalore is different from Bangalore to Hyderabad) in 15P₂ ways.   15P₂ = 15* 14= 
<gadget id="calculator">15* 14</gadget>
<output>210</output>
210.   Answer: 210
<result>E</result>
There are 13 stations between Hyderabad and Bangalore. How many second class tickets have to be printed, so that a passenger can travel from any station to any other station?