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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 4 · Set 3 · Q1
If A is a 3 × 4 matrix and B is a matrix such that A^′ B and AB^′ are both defined, then the order of the matrix B is:
If A is a $\displaystyle 3 \times 4$ matrix and B is a matrix such that $\displaystyle \mathrm{A}^{\prime} \mathrm{B}$ and $\displaystyle \mathrm{AB}^{\prime}$ are both defined, then the order of the matrix $\displaystyle \mathrm{B}$ is :
Official answer
(A)
$\displaystyle 3 \times 4$
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CBSE Class 12 Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.