Question

You want to watch three movies from a stack of six movies. In how many different ways could you arrange the sequence in which you watch three of the movies?

Answer 1

you want to watch 3 movies one after another, and you have 6 movies to pick from. right ?

Answer 2

First movie can be chosen in 6 ways

Answer 3

after that second movie can be chosen in 5 ways

Answer 4

lastly third movie in 4 ways

so total number of sequences possible = 6*5*4


this is true only if you're not watching any movie more than once !