CUET · MATHS · PYQ PAPER 2025
The probability distribution of a random discrete variable is given
| X | -1 | 0 | 1 | 2 | 3 |
| P(X) | 0.1 | p | 0.3 | q | r |
- A 0
- B 0.1
- C 0.2
- D 0.3
Answer & Solution
Correct Answer
(A) 0
Step-by-step Solution
Detailed explanation
\(\sum P(X) = 1 \implies 0.1 + p + 0.3 + q + r = 1\) \(p + q + r = 0.6\) (1) \(P(X=1) = \frac{P(X=0) + P(X=2)}{2} \implies 0.3 = \frac{p+q}{2}\) \(p + q = 0.6\) (2) \(0.6 + r = 0.6\) \(r = 0\)
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