It is a well-defined group of objects, Universal Set, Elements of a Set, Cardinality of a Set, Subset, Proper subset, Set, It is the member of a set., Elements of a Set, Cardinality of a Set, Subset, Proper subset, Set, Universal Set, It is a set that contains all objects under consideration., Subset, Universal Set, Proper subset, Set, Cardinality of a Set, Elements of a Set.

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