Ordered pair

12.1 Outline

1. Election problem
   1. tree diagram
   2. fundamental counting principle
   3. arrangement
   4. ordered pair/ordered triple
   5. define permutation
   6. notation for permutations
   7. evaluating permutations
2. Factorial
   1. definition
   2. multiplication property of factorials
   3. count-down property
   4. permutation formula
3. Distinguishable permutations
   1. indistinguishable items
   2. distinguishable items
   3. formula for distinguishable permutations