ICM Notes 6.4 Permutations and Combinations Permutation – an arrangement of a set of objects __________________________________________ Ex 1: A boy has 4 beads – red, blue, white, yellow. How many different ways can they be arranged in a row? Ex 2 – All 20 ICM students are in a contest. How many ways can 1st, 2nd, and 3rd place be awarded? n-Factorial n! n! = 0! = The # of permutations of n different objects taken r at a time is P(n, r) = Revisit Ex 2:
ICM Notes 6.4 Permutations and Combinations Permutation – an arrangement of a set of objects __________________________________________ Ex 1: A boy has 4 beads – red, blue, white, yellow. How many different ways can they be arranged in a row? Ex 2 – All 20 ICM students are in a contest. How many ways can 1st, 2nd, and 3rd place be awarded? n-Factorial n! n! = 0! = The # of permutations of n different objects taken r at a time is P(n, r) = Revisit Ex 2: