Question

If $A$ and $B$ are disjoint sets, then $B\cap A^{\prime }$ where $A^{\prime }$ is complement of $A$ is equal to

• A. A
• B. B
• C. A'
• D. B'

Answer 1

Answer: (B)

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