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Mathematics · 2025 · 1 mark
CBSE 2025 · Region 5 · Set 2 · Q7
If P ( A ∪ B )=0.9 and P ( A ∩ B )=0.4, then P (Ā)+ P (B̄) is:
If $\displaystyle \mathrm{P}(\mathrm{A} \cup \mathrm{B})=0.9$ and $\displaystyle \mathrm{P}(\mathrm{A} \cap \mathrm{B})=0.4$, then $\displaystyle \mathrm{P}(\overline{\mathrm{A}})+\mathrm{P}(\overline{\mathrm{B}})$ is :
Official answer
(D)
$\displaystyle 0 \cdot 7$
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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.