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If A and B are disjoint sets and A contains 5 elements and B contains 7 how many elements are in the union of A and B?
Wiki User
∙ 12y ago
Disjoint means they have no elements in common. The union is the set of elements containing all elements from both sets. Since there is no overlap, the union will have 5+7 elements.
Therefore the answer is 12.
Wiki User
∙ 12y ago
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