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{\bf Question}

State the order of the following matrices
$$A=\left(\begin{array}{cc} 1 &amp; 0\\ -1 &amp; 2 \end{array} \right)\ \
B=(\begin{array}{ccc} 4 &amp; 7 &amp; 11 \end{array})\ \
C=\left(\begin{array} {ccccc} 3 &amp; 6 &amp; 45 &amp; -9 &amp; 5\\ 0 &amp; 0 &amp; 0 &amp; 1
&amp; 0\\ 15 &amp; 32 &amp; 4 &amp; 5 &amp; -76
\end{array} \right)$$

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{\bf Answer}

A: 2 rows, 2 columns $\Rightarrow 2 \times 2$

B: 1 row, 3 columns $\Rightarrow 1 \times 3$

C: 3 rows, 5 columns $\Rightarrow 3 \times 5$

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