There are 14 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?  Pick one
A) 288  B) 267  C) 261  D) 211  E) 240

Rationale: "the total number of stations = 16 from 16 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 16 p ₂ ways . 16 p ₂ = 16 * 15 = 240 . answer : e"
Answer: E