Permutations / Arrangements (Leaving Cert Mathematics): Quizzes

An arrangement in a specific order

When order of selection matters

Product of all positive integers up to $n$

24

$n!$

$\frac{n!}{(n-r)!}$

60

$\frac{n!}{p_1! \times p_2! \times \ldots}$

They are reduced

3

60

Counting problems and probability