CUET · MATHS · PYQ PAPER 2025
In a Binomial distribution, the probability of getting a success is \(\frac{3}{4}\) and the variance is \(\frac{3}{8}\) then the probability of no success is:
- A \(\frac{1}{4}\)
- B \(\frac{3}{4}\)
- C \(\frac{1}{16}\)
- D \(\frac{3}{16}\)
Answer & Solution
Correct Answer
(C) \(\frac{1}{16}\)
Step-by-step Solution
Detailed explanation
\(q = 1 - p = 1 - \frac{3}{4} = \frac{1}{4}\) \(npq = \frac{3}{8} \Rightarrow n \cdot \frac{3}{4} \cdot \frac{1}{4} = \frac{3}{8} \Rightarrow n = 2\) \(P(X=0) = \binom{n}{0} p^0 q^n = q^n = \left(\frac{1}{4}\right)^2 = \frac{1}{16}\)
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