Discusses the building of tree diagrams.
http://www.shodor.org/interactivate/discussions/pd8.html
Permutations:
http://www.cut-the-knot.org/do_you_know/permutation.shtml
Permutation patterns:
http://www.blarg.net/~math/permutations.html
Discusses the building of tree diagrams.
http://www.shodor.org/interactivate/discussions/pd8.html
Permutations:
http://www.cut-the-knot.org/do_you_know/permutation.shtml
Permutation patterns:
http://www.blarg.net/~math/permutations.html