Question

If $A=\left[\begin{array}{ccc}1& 2& 3\end{array}\right]$, then order is

• A. $3\times 1$
• B. $1\times 3$
• C. $2\times 3$
• D. None of these

Answer 1

The correct option is B $1\times 3$

An $m\times n$ matrix has $m$ row and $n$ columns.

The given matrix $A=\left[\begin{array}{ccc}1& 2& 3\end{array}\right]$ has $1$ row and $3$ columns.

Thus, order of $A$ is $1\times 3$.

Hence, option B is correct.