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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 1 · Q18
If E and F are two independent events such that P ( E )=3/10, P ( E ∪ F )=1/2, then P ( E ∣ F )- P ( F ∣ E ) is equal to:
If E and F are two independent events such that $\displaystyle \mathrm{P}(\mathrm{E})=\frac{3}{10}, \mathrm{P}(\mathrm{E} \cup \mathrm{F})=\frac{1}{2}$, then $\displaystyle \mathrm{P}(\mathrm{E} \mid \mathrm{F})-\mathrm{P}(\mathrm{F} \mid \mathrm{E})$ is equal to :
Official answer
(C)
$\displaystyle \frac{1}{70}$
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CBSE Class 12 Mathematics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.