Question

Let set $X=\{a,b,c\}$ and $Y=\varphi$. The number of ordered pairs in $X\times Y$ are

• A. $0$
• B. $1$
• C. $2$
• D. $3$

Answer 1

Answer: (A)

$X\times Y=\{a,b,c\}\times \{\}=\varphi$
Hence there are no ordered pairs formed in $X\times Y$.