Question

If $A=\{1,2\}andB=\{3,4\}$ how many subsets will $A\times B$

Answer 1

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

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

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

Hence , the total number of subsets

$A\times B=2^4=16$