'Example de morgan' diaporamas de présentation

5.2 A Fundamental Principle of Counting

5.2 A Fundamental Principle of Counting. Number of Elements in A Inclusion-Exclusion Principle Venn Diagram De Morgan's Laws. Number of Elements in A. If S is any set, we will denote the number of elements in S by n ( S ). For example, if S = {1,7,11}, then n ( S ) = 3;

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