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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 5 · Set 1 · Q4
Let A = [0, -3, 4; 1, 0, 2] and B = [-3, 0, 1; 2, 4, 0]. If A + B + C = O, then matrix C is:
Let $\displaystyle \mathrm{A}=\left[\begin{array}{ccc}0 & -3 & 4 \\ 1 & 0 & 2\end{array}\right]$ and $\displaystyle \mathrm{B}=\left[\begin{array}{ccc}-3 & 0 & 1 \\ 2 & 4 & 0\end{array}\right]$. If $\displaystyle \mathrm{A}+\mathrm{B}+\mathrm{C}=\mathrm{O}$, then matrix C is :
Official answer
(C)
$\displaystyle \left[\begin{array}{rrr}3 & 3 & -5 \\ -3 & -4 & -2\end{array}\right]$
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CBSE Class 12 Mathematics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.