Question

There are 20 stations on a railway line. How many different kinds of single first xlass tickets must be printed so as to enable a passenger to go from one station to another?

Answer 1

Answer:

There must be 380 First Class tickets printed

Step-by-step explanation:

For each of 20 stations , the passenger will be requiring the tickets for remaining 19 stations (except the station in which he/she is in)

so, 19 * 20 = 380 tickets

Answer 2

Answer:

380

Step-by-step explation;

19*20 = 380