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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 2 · Set 3 · Q3
If for two events A and B, P ( A - B )=1/5 and P ( A )=3/5, then P (B/A) is equal to 1
If for two events A and $\displaystyle \mathrm{B}, \mathrm{P}(\mathrm{A}-\mathrm{B})=\frac{1}{5}$ and $\displaystyle \mathrm{P}(\mathrm{A})=\frac{3}{5}$, then $\displaystyle \mathrm{P}\left(\frac{\mathrm{B}}{\mathrm{A}}\right)$ is equal to $\displaystyle 1$
Official answer
(D)
$\displaystyle \frac{2}{3}$
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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.