Statistics and Probability Dictionary

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The union of two sets is the set of elements that belong to one or both sets. Symbolically, the union of X and Y is denoted by X Y.

As an example, suppose set A = {1, 2, 3} and set B = {1, 3, 5}. Then, the union of sets A and B would be {1, 2, 3, 5}.

See also:   Sets and Subsets