If set $A$ has $p$ elements and set $B$ has $q$ elements,then the number of elements in $A \times B$ is:

Let $A$ and $B$ be two sets such that $n(A)=3$ and $n(B)=2$. If $(x, 1), (y, 2), (z, 1)$ are in $A \times B$,find $A$ and $B$,where $x, y$ and $z$ are distinct elements.

Let $A, B, C$ be three sets such that $n(A \cap B) = n(B \cap C) = n(C \cap A) = n(A \cap B \cap C) = 2$. Then $n((A \times B) \cap (B \times C))$ is equal to -

If $R$ is the set of all real numbers,what do the Cartesian products $R \times R$ and $R \times R \times R$ represent?

If $A$ and $B$ are two sets,then $A \times B = B \times A$ if and only if

Let $A$ and $B$ be two sets containing $4$ and $2$ elements respectively. Then the number of subsets of the set $A \times B$ each having at least $3$ elements is: