Combinatorial Proofs

Two Counting Principles

Examples

Examples

Examples

Lists (ordered arrangements.htm

Permutaton Problems

Permutation Problems

Permutation Problems

Permutation problems

Special Assignment #2

And while we're on the subject ...

r-sets of an n-set

Combinations

Combinations

Poker Hands

Committee Selections

The Binomial Theorem

The Binomial Theorem

Binomial Theorem

Binomial Theorem

Binomial Theorem

Binomial Theorem

Counting Proofs

Combinatorial Proofs

An old favorite

Combinatorial Proofs

Pascal's Triangle

Pascal's Triangle

Pascal's Triangle

Pascal's Triangle

Pascal's Triangle

Pascal's Triangle

Pascal's (?) Triangle

Pascal's (?) Triangle

One More Counting Proof