x Turn on thread page Beta
Why does a!/(a-b)! give the number of combinations? watch
- Thread Starter
- 19-01-2015 18:53
(Original post by Brian Moser)
- 19-01-2015 18:59
Say you had a people on a train, and b train stations. If no more than 1 person got off at each station, and the train was empty by the last stop, why would the number of ways that people could leave the train be given by ?
I would have thought it was b! In the numerator