CUET · MATHS · PYQ PAPER 2025
If a random variable \(X\) has the following probability distribution :
| X | 0 | 1 | 2 | 3 |
| P(X) | K | \(\frac{K}{2}\) | \(\frac{K}{4}\) | \(\frac{K}{8}\) |
Match List-I with List-II
| List-I | List-II |
| (A) The value of \(K\) is | (I) \(2 / 15\) |
| (B) \(P(0<X<2)\) is | (II) \(1 / 15\) |
| (C) \(P(1<X<3)\) is | (III) \(8 / 15\) |
| (D) \(P(X>2)\) is | (IV) \(4 / 15\) |
- A (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
- B (А) - (II), (B) - (III), (С) - (I), (D) - (IV)
- C А) - (III), (В) - (IV), (C) - (I), (D) - (II)
- D (A) - (IV), (B) - (I), (С) - (III), (D) - (II)
Answer & Solution
Correct Answer
(C) А) - (III), (В) - (IV), (C) - (I), (D) - (II)
Step-by-step Solution
Detailed explanation
\( \sum P(X) = 1 \) \( K + \frac{K}{2} + \frac{K}{4} + \frac{K}{8} = 1 \) \( K\left(1 + \frac{1}{2} + \frac{1}{4} + \frac{1}{8}\right) = 1 \) \( K\left(\frac{8+4+2+1}{8}\right) = 1 \) \( K\left(\frac{15}{8}\right) = 1 \) \( \text{(A) } K = \frac{8}{15} \quad (\text{III}) \)…
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