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Mathematics for IGCSE & O level - Sets (Section 3 - No. 32)

What is the result of the following set operation: A ∪ (A ∩ B)?
A
B
A ∩ B
The universal set

Uitleg

Since A ∩ B is a subset of A, the union of A and (A ∩ B) is just A.

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