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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 5 · Set 1 · Q17
If for any two events A and B, P ( A )=4/5 and P ( A ∩ B )=7/10, then P ( B / A ) is equal to
If for any two events A and $\displaystyle \mathrm{B}, \mathrm{P}(\mathrm{A})=\frac{4}{5}$ and $\displaystyle \mathrm{P}(\mathrm{A} \cap \mathrm{B})=\frac{7}{10}$, then $\displaystyle \mathrm{P}(\mathrm{B} / \mathrm{A})$ is equal to
Official answer
(C)
$\displaystyle \frac{7}{8}$
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CBSE Class 12 Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.