If the set $A$ has $p$ elements, $B$ has $q$ elements, then the number of elements in $A × B$ is
$p + q$
$p + q + 1$
$pq$
${p^2}$
If $A = \{2, 3, 5\}, B = \{2, 5, 6\},$ then $(A -B) × (A \cap B)$ is
If $A, B$ and $C$ are any three sets, then $A \times (B \cup C)$ is equal to
If $n(A) = 4$, $n(B) = 3$, $n(A \times B \times C) = 24$, then $n(C) = $
If $A = \{1, 2, 4\}, B = \{2, 4, 5\}, C = \{2, 5\},$ then $(A -B) × (B -C)$ is
If $A$ and $B$ are two sets, then $A × B = B × A$ iff