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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 × 1
  • ✓
    1 × 3
  • C
    2 × 3
  • D
    None of these
✓

Answer

Correct option: B.
1 × 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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