CBSE 2025 · Region 7 · Set 1 · Q17 · 1 mark
If $\displaystyle \mathrm{P}(\mathrm{A})=\frac{1}{7}, \mathrm{P}(\mathrm{B})=\frac{5}{7}$ and $\displaystyle \mathrm{P}(\mathrm{A} \cap \mathrm{B})=\frac{4}{7}$, then $\displaystyle \mathrm{P}(\overline{\mathrm{A}} \mid \mathrm{B})$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle \frac{1}{5}$
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CBSE Class 12 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.