If order of matrix $A$ is $m \times p$ and order of matrix $B$ is $p \times n$, then what is the order of matrix $A B$ ?
Answer & explanation
Correct answer: option 2
order (A) = $m \times p$
order (B) = $p \times n$
so order(AB) = $m \times n$ (values of row of A and column of B)