Question

If $A=\{1,2,4\},B=\{2,4,5\},C=\{2,5\}$, then $(A-C)\times (B-C)$ is equal to

• A. $\left\{\right(1,4\left)\right\}$
• B. $\left\{\right(1,4),(4,4\left)\right\}$
• C. $\left\{\right(4,1),(4,4\left)\right\}$
• D. none of these

Answer 1

Answer: (B)

$\left\{\right(1,4),(4,4\left)\right\}$

$A-c=\{1,4\}$ and $B-C=\left\{4\right\}$
$\therefore (A-C)\times (B-C)=\{1,4\}\times \left\{4\right\}=\left\{\right(1,4),(4,4\left)\right\}$