Question

If set $A$ has $3$ elements and the set $B=\{3,4,5\}$, then find the number of elements in $(A\times B)$.

• A. $8$
• B. $7$
• C. $9$
• D. $10$

Answer 1

Answer: (C)

$n(A)=3$ and $n(B)=3$
$\therefore n(A\times B)=3\times 3=9$