1.

On a railway there are 20 stations. The number of different tickets required in order that it may be possible to travel from every station to every station isA. 40B. 380C. 400D. 420

Answer» Correct Answer - B
From each railway station, there are 19 different tickets to be issued. There are 20 railway station
So, total number of tickets `= 20 xx 19 = 380`


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