On a railway track, there are 20 station...

On a railway track, there are 20 stations. The number of tickets required in order that it may be possible to book a passenger from every station to every other is

A

`"^20C_2`

B

`"^20P_2`

C

`20^2`

D

`2^20`

Text Solution

Verified by Experts

Promotional Banner

Promotional Banner

Recommended Questions

On a railway track, there are 20 stations. The number of tickets requi...
Text Solution
|
In a network of railways, a small island has 15 stations. Find the ...
Text Solution
|
On a railway there are 20 stations. The number of different tickets re...
Text Solution
|
On a raiway there are 10 stations. The number of types of tickets requ...
Text Solution
|
There are 10 railway stations between a station X and another station ...
Text Solution
|
There are 12 stations on a certain railway line . How many different k...
Text Solution
|
On a railway there are 20 stations. The number of different tickets r...
Text Solution
|
There are 10 stations on a railway line. The number of different journ...
Text Solution
|
There are 10 stations in a railway line. The number of different journ...
Text Solution
|