If $A$ and $B$ are two sets, then $A × B = B × A$ iff
$A \subseteq B$
$B \subseteq A$
$A = B$
None of these
Let $A=\{1,2\}$ and $B=\{3,4\} .$ Write $A \times B .$ How many subsets will $A \times B$ have? List them.
If two sets $A$ and $B$ have $99$ elements in common, then the number of elements common to the sets $A \times B$ and $B \times A$ is equal to
If $A = \{2, 3, 5\}, B = \{2, 5, 6\},$ then $(A -B) × (A \cap B)$ is
If $A \times B =\{(p, q),(p, r),(m, q),(m, r)\},$ find $A$ and $B$
Let $A=\{1,2,3\}, B=\{3,4\}$ and $C=\{4,5,6\} .$ Find
$A \times(B \cup C)$