ExamBro
ExamBro
CUET · MATHS · PYQ PAPER 2025

If a random variable \(X\) has the following probability distribution :
X0123
P(X)K\(\frac{K}{2}\)\(\frac{K}{4}\)\(\frac{K}{8}\)
then,
Match List-I with List-II
List-IList-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) \(4 / 15\)
Choose the correct answer from the options given below :

  1. A (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
  2. B (А) - (II), (B) - (III), (С) - (I), (D) - (IV)
  3. C А) - (III), (В) - (IV), (C) - (I), (D) - (II)
  4. D (A) - (IV), (B) - (I), (С) - (III), (D) - (II)
Verified Solution

Answer & Solution

Correct Answer

(C) А) - (III), (В) - (IV), (C) - (I), (D) - (II)

Step-by-step Solution

Detailed explanation

\( \sum P(X) = 1 \) \( K + \frac{K}{2} + \frac{K}{4} + \frac{K}{8} = 1 \) \( K\left(1 + \frac{1}{2} + \frac{1}{4} + \frac{1}{8}\right) = 1 \) \( K\left(\frac{8+4+2+1}{8}\right) = 1 \) \( K\left(\frac{15}{8}\right) = 1 \) \( \text{(A) } K = \frac{8}{15} \quad (\text{III}) \)…