Lecture4

# Example 33 3 3 3 3 2 1 6 3 3 0 45 permutation basic

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Unformatted text preview: = 3! 3! = = 3! = 3 × 2 × 1 = 6 (3 − 3)! 0! 4.5 Permutation Basic Counting Rule; Permutations; Combinations Basic Counting Rules Permutations Combinations 4.6 Notes Basic Counting Rule; Permutations; Combinations Combination Deﬁnition Notes A combination of r objects from a collection of n objects is any unordered arrangement of r distinct objects from the n total objects. Remark: The difference between a combination and a permutation is that order of the objects is not important for a combination. Notation: Formula: n r n r Basic Counting Rules Permutations Combinations or n Cr = n! (n−r )!×r ! 4.7 Combination Basic Counting Rule; Permutations; Combinations Basic Counting Rules Permutations Combinations 4.8 Notes Basic Coun...
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