There are 15 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 answer.
A) 288 B) 267 C) 261 D) 211 E) 272
The total number of stations = 17   From 17 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 17P₂ ways.   17P₂ = 17* 16= 
<gadget id="calculator">17* 16</gadget>
<output>272</output>
272.   Answer: 272
<result>E</result>
There are 15 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?