The Joy Of Counting

Combinatoricsis the study of counting questions such as: How many outfits are possible if you own 8 shirts, 5 pairs of p... (more)

Combinatoricsis the study of counting questions such as: How many outfits are possible if you own 8 shirts, 5 pairs of pants, and 10 ties? A trickier question: How many ways are there to arrange 10 books on a shelf? Combinatorics can also be used to analyze numbering systems, such as ZIP Codes or license plates, as well as games of chance. (less)