In how many ways can four people sit in a row of five chairs?

1 Answer
George C.
May 2, 2018

#120#

Explanation:

In exactly as many ways that #5# people can, since any fifth person would only have one choice of chair - the empty one.

So the number of ways that #4# people can sit in #5# chairs is:

#5 xx 4 xx 3 xx 2 = 5 xx 4 xx 3 xx 2 xx 1 = 5! = 120#

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