Question

The order of a matrix $\left[\begin{array}{ccc}2& 5& 7\end{array}\right]$ is

• A. $3\times 3$
• B. $1\times 1$
• C. $3\times 1$
• D. $1\times 3$

Answer 1

The correct option is D $1\times 3$

Since, Order of a matrix is represented by $m\times n$, where $m$ is the number of rows and $n$ is the number of columns.
Given, $\left[\begin{array}{ccc}2& 5& 7\end{array}\right]$ is a matrix in which number of row is $1$ and number of columns are $3$.
$\therefore$ $\left[\begin{array}{ccc}2& 5& 7\end{array}\right]$ is a matrix of order $1\times 3$Option $D$ is correct.