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If cardinality of (A U B) = cardinality of A+ cardinality of B. This means ____________

If cardinality of (A U B) = cardinality of A+ cardinality of B. This means ____________ Correct Answer A and B are disjoint

Thus if the cardinality of (A U B) = cardinality of A+ cardinality of B, it means they don’t have any element in common, n(A∩B) = 0.

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