Question

Identify the matrix whose order is $4\times 3$

• A. $\left[\begin{array}{cccc}1& 3& 5& 3\\ 4& 6& 8& 5\\ 5& 7& 9& 6\end{array}\right]$
• B. $\left[\begin{array}{ccc}3& 5& 7\\ 4& 6& 8\\ 2& 4& 6\end{array}\right]$
• C. $\left[\begin{array}{ccc}1& 2& 3\\ 4& 4& 1\\ 1& 2& 2\\ 1& 0& 4\end{array}\right]$
  
• D. $\left[\begin{array}{ccc}1& -3& 1\\ 2& 1& 4\end{array}\right]$

Answer 1

The correct option is C

$\left[\begin{array}{ccc}1& 2& 3\\ 4& 4& 1\\ 1& 2& 2\\ 1& 0& 4\end{array}\right]$

A matrix whose order is $4\times 3$ has 4 rows and 3 columns.
Hence $\left[\begin{array}{ccc}1& 2& 3\\ 4& 4& 1\\ 1& 2& 2\\ 1& 0& 4\end{array}\right]$ is of order $4\times 3$.