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Previous Year Question (PYQs)

If $A$ and $B$ are two sets, then $(A \cup B)' \cap B$ is equal to …




Solution

$(A \cup B)'$ means elements not in $A$ or $B$. Hence, $(A \cup B)' \cap B$ contains elements that are both in $B$ and not in $B$, i.e., none. So result is $\phi$.

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