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  4. If A and B are disjoint sets, then B ∩ A' where A' is complement of A is equal to

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Q. If $ A $ and $ B $ are disjoint sets, then $ B \cap A' $ where $ A' $ is complement of $ A $ is equal to

AMUAMU 2018

Solution:

Given $A$ and $B$ are disjoint sets
$A \cap B=\phi$
Now, $B \cap A^{\prime}=B-A=B-(A \cap B)=B-\phi=B$