Choosing 5 out of 8, when order matters P58, or choosing 5 out of 8, without order and then arranging: C58∗5!
Eight friends go to watch a movie but only 5 tickets were available. In how many different ways can 5 people sit and watch the movie?

(1) 8C5
(2) 8*7*6*5*4
(3) 5!
(4) 8!/5!
(5) 8*5