CBSE 2022 · Region 3 · Set 1 · Q5 · 2 marks
Two cards are drawn successively with replacement from a well shuffled pack of $\displaystyle 52$ cards. Find the probability distribution of the number of spade cards.
Marking-scheme solution
Let X denotes the number of spades
\[p=\frac{13}{52}=\frac{1}{4}, q=\frac{3}{4}
\]
P(X) & \(\displaystyle \frac{3}{4} \cdot \frac{3}{4}=\frac{9}{16}\) & \(\displaystyle 2 . \frac{3}{4} \cdot \frac{1}{4}=\frac{6}{16}\) & \(\displaystyle \frac{1}{4} \cdot \frac{1}{4}=\frac{1}{16}\)
ProbabilityRandom Variable and its Probability DistributionApplyvery_short_answermedium
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CBSE Class 12 Mathematics past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.