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CUET · MATHS · PYQ PAPER 2023

Let \(X\) denotes the number of hours you study during a randomly selected school day. The random variable \(X\) has the following probability distribution.
X01234
P(X)K2K2K2KK
Match List - I with List - II.
LIST - ILIST - II
(A) Value of K(I) \(\frac{1}{4}\)
(B) Probability you study at least two hours(II) \(\frac{1}{8}\)
(C) Probability you study exactly two hours(III) \(\frac{3}{8}\)
(D) Probability you study at most one hour(IV) \(\frac{5}{8}\)
Choose the correct answer from the options given below:

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

Answer & Solution

Correct Answer

(A) (A)-(II), (B)-(IV), (C)-(I), (D)-(III)

Step-by-step Solution

Detailed explanation

(A) \( \sum P(X) = 1 \) \( K + 2K + 2K + 2K + K = 1 \) \( 8K = 1 \Rightarrow K = \frac{1}{8} \) (B) \( P(X \ge 2) = P(X=2) + P(X=3) + P(X=4) \) \( P(X \ge 2) = 2K + 2K + K = 5K = 5 \times \frac{1}{8} = \frac{5}{8} \) (C) \( P(X=2) = 2K \)…
From CUET
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