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Matrices — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsMatrices1 Mark
MCQ
If $\text{A}= \begin{bmatrix} 1 &\text{amp; } 2 &\text{amp;} 3\end{bmatrix},$ then order is :
  • A
    $3 \times 1$
  • ✓
    $1 \times 3$
  • C
    $2 \times 3$
  • D
    None of these
✓

Answer

Correct option: B.
$1 \times 3$
An $\text{m}\times\text{n} $ matrix has $m$ row and $n$ columns.
The given matrix $\text{A}= \begin{bmatrix} 1 &\text{amp; } 2 &\text{amp;} 3\end{bmatrix},$ has $1$ row and $3$ columns.
Thus, order of $A$ is $ 1\times3.$

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