CBSE 2025 · Region 1 · Set 1 · Q2 · 1 mark
If $\displaystyle \mathrm{x}=1$ and $\displaystyle \mathrm{y}=2$ is a solution of the pair of linear equations $\displaystyle 2 \mathrm{x}-3 \mathrm{y}+\mathrm{a}=0$ and $\displaystyle 2 \mathrm{x}+3 \mathrm{y}-\mathrm{b}=0$, then :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 2 \mathrm{a}=\mathrm{b}$
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CBSE Class 10 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.