Permutations

Counting when order matters. Box Occupant Based Thinking helps

Permutation Notation

${}_n$P${}_r$

n = # of occupants r = # of boxes

P(n,r)

Permutation formula

${}_n{P}_r=\frac{n!}{(n-r)!}$

Concepts

• Cyclic Permutation
• Permutations with Repetition
• Permutations with Identical Items
• Pascal Routes