Determine the Cardinality of a Set Given Cardinality of Union and Intersection

This video explains how to use a Venn diagram with given cardinalities of sets to determine the cardinality of another set.

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Determine the Cardinality of an Universal Set Using a Venn Diagram

This video explains how to use a Venn diagram with given cardinalities of sets to determine the cardinality of the universal set.