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Mathematics · 2025 · 1 mark
CBSE 2025 · Region 2 · Set 3 · Q1
If for any event E, P ( E )+ P (Ē)= q, then the value of q^2-3 is:
If for any event $\displaystyle \mathrm{E}, \mathrm{P}(\mathrm{E})+\mathrm{P}(\overline{\mathrm{E}})=\mathrm{q}$, then the value of $\displaystyle \mathrm{q}^{2}-3$ is :
Official answer
(B)
$\displaystyle - 2$
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CBSE Class 10 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.