Let A = {1, 2} and B = {3, 4}. Write A × B.


Let $A=\{1,2\}$ and $B=\{3,4\}$. Write $A \times B$. How many subsets will $A \times B$ have? List them.


$A=\{1,2\}$ and $B=\{3,4\}$

$\therefore A \times B=\{(1,3),(1,4),(2,3),(2,4)\}$

$\Rightarrow n(A \times B)=4$

We know that if $C$ is a set with $n(C)=m$, then $n[P(C)]=2^{m}$.

Therefore, the set $A \times B$ has $2^{4}=16$ subsets. These are





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