Question

Let $U=\{1,2,3,4,5,6,7,8,9,10\}$, $A=\{1,2,5\}$, $B=\{6,7\}$ then $A\cap B^{\prime }$ is

• A. $B^{\prime }$
• B. $A$
• C. $A^{\prime }$
• D. $B$

Answer 1

The correct option is B $A$

$B^{\prime }=\{1,2,3,4,5,8,9,10\}$

$\therefore A\cap B^{\prime }=\{1,2,5\}\cap \{1,2,3,4,5,8,9,10\}$

$=\{1,2,5\}=A$