Question

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

• A. $\{(1,4)\}$
• B. $\{(1,4),(4,4)\}$
• C. $\{(4,1),(4,4)\}$
• D. $\{(1,2)(2,5)\}$

Answer 1

Answer: (B)

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