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MTH 120 - Using Venn Diagrams

# MTH 120 - Using Venn Diagrams - The final step is to...

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Example 4 (p. 419) To answer Example 4, you must first understand: The “union” of A and B : A B • “not” B : B g137 The final step is to remember how an “intersection” works… Anything that will be in an “intersection” of two sets, for example, A B and B , must be in BOTH sets! In terms of Venn diagrams, if A B is the set of horizontal lines and B is the set of diagonal lines, then the intersection of A B and B , i.e., ( A B ) B , is only that portion of the Venn diagram that has BOTH horizontal AND diagonal lines. g137 g137 g137 g136 g137

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U = { The people surveyed } | U | = 450 135 72 108 135
U = { The people surveyed } | U | = 450 135

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