Question

Let $A=\{3,5,7,9,11\}$, $B=\{7,9,11,13\},C=\{11,13,15\}$ and $D=\{15,17\}$.
The set $A\cap C\cap D$ is

• A. $\{11\}$
• B. $\{15\}$
• C. $\{13\}$
• D. $\varphi$

Answer 1

Answer: (D)

$A=\{3,5,7,9,11\},C=\{11,13,15\}$
and $=\{15,17\}$
$C\cap D=\{15\}$
$A\cap C\cap D=\varphi$