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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 4 · Set 1 · Q19
Assertion (A) : If probability of happening of an event is $\displaystyle 0.2$ p, p > $\displaystyle 0$, then p can't be more than 5.
Reason (R) : $\displaystyle \mathrm{P}(\overline{\mathrm{E}})=1-\mathrm{P}(\mathrm{E})$ for an event E .
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
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CBSE Class 10 Mathematics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.