CUET · MATHS · PYQ PAPER 2025

Two cards are drawn simultaneously at random from a well shuffled pack of 52 Cards.
Let X be the random variable which denotes number of kings in the draw. Then the probability distribution of X is

A
X 0 1 2
P(X) \(\frac{{ }^{48} C_2}{{ }^{52} C_2}\) \(\frac{{ }^4 C_1 \times{ }^{48} C_1}{{ }^{52} C_2}\) \(\frac{{ }^4 C_2}{52 C_2}\)
B
X 0 1 2
P(X) \(\frac{{ }^4 C_2}{{ }^{52} C_2}\) \(\frac{{ }^4 C_1 \times{ }^{48} C_1}{{ }^{52} C_2}\) \(\frac{{ }^4 C_2}{{ }^{52} C_2}\)
C
X 0 1 2
P(X) \(\frac{{ }^4 C_2}{{ }^{52} C_2}\) \(\frac{{ }^4 C_1 \times{ }^{48} C_1}{{ }^{52} C_2}\) \(\frac{{ }^{48} C_2}{{ }^{52} C_2}\)
D
X 0 1 2
P(X) \(\frac{{ }^4 C_0}{{ }^{52} C_2}\) \(\frac{{ }^{48} C_1}{{ }^{52} C_2}\) \(\frac{{ }^4 C_2}{{ }^{52} C_2}\)

Verified Solution

Answer & Solution

Correct Answer

(A)

X	0	1	2
P(X)	\(\frac{{ }^{48} C_2}{{ }^{52} C_2}\)	\(\frac{{ }^4 C_1 \times{ }^{48} C_1}{{ }^{52} C_2}\)	\(\frac{{ }^4 C_2}{52 C_2}\)

Step-by-step Solution

Detailed explanation

\(P(X=0) = \frac{{ }^{48} C_2 \times { }^4 C_0}{{ }^{52} C_2} = \frac{{ }^{48} C_2}{{ }^{52} C_2}\) \(P(X=1) = \frac{{ }^{48} C_1 \times { }^4 C_1}{{ }^{52} C_2}\) \(P(X=2) = \frac{{ }^{48} C_0 \times { }^4 C_2}{{ }^{52} C_2} = \frac{{ }^4 C_2}{{ }^{52} C_2}\) X 0 1 2 P(X)…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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X	0	1	2
P(X)	\(\frac{{ }^4 C_2}{{ }^{52} C_2}\)	\(\frac{{ }^4 C_1 \times{ }^{48} C_1}{{ }^{52} C_2}\)	\(\frac{{ }^4 C_2}{{ }^{52} C_2}\)

X	0	1	2
P(X)	\(\frac{{ }^4 C_0}{{ }^{52} C_2}\)	\(\frac{{ }^{48} C_1}{{ }^{52} C_2}\)	\(\frac{{ }^4 C_2}{{ }^{52} C_2}\)

Two cards are drawn simultaneously at random from a well shuffled pack of 52 Cards.Let X be the random variable which denotes number of kings in the draw. Then the probability distribution of X is

Step-by-step Solution

Two cards are drawn simultaneously at random from a well shuffled pack of 52 Cards.
Let X be the random variable which denotes number of kings in the draw. Then the probability distribution of X is