Question

Four friends are going to sit together in a roller-coaster car that has 4 seats. In how many different arrangements can they sit?

Answer 1

24 ways

Answer 2

It's 4!.. ( 4 Factorial permutaion problem)

Answer 3

\[\huge \color{green}{= ^{4}P_4 = \frac{4!}{(4-4)!} = \frac{4!}{1!} = 4!}\]