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Mathematics · 2025 · 1 mark
CBSE 2025 · Region 7 · Set 2 · Q17
If P ( A )=1/5, P ( B )=3/5 and P (A/B)=2/5, then P ( A^′ ∩ B^′) is:
If $\displaystyle \mathrm{P}(\mathrm{A})=\frac{1}{5}, \mathrm{P}(\mathrm{B})=\frac{3}{5}$ and $\displaystyle \mathrm{P}\left(\frac{\mathrm{A}}{\mathrm{B}}\right)=\frac{2}{5}$, then $\displaystyle \mathrm{P}\left(\mathrm{A}^{\prime} \cap \mathrm{B}^{\prime}\right)$ is :
Official answer
(A)
$\displaystyle \frac{11}{25}$
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CBSE Class 12 Mathematics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.