Probability 4 Question 16
16. If $n$ is even and $E$ denotes the event of choosing even numbered urn $P\left(u _i\right)=\frac{1}{n}$, then the value of $P(W / E)$ is
(a) $\frac{n+2}{2 n+1}$
(b) $\frac{n+2}{2(n+1)}$
(c) $\frac{n}{n+1}$
(d) $\frac{1}{n+1}$
Analytical and Descriptive Questions
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Answer:
Correct Answer: 16. (b)
Solution:
- $P \frac{W}{E}=\frac{2+4+6+\ldots}{\frac{n(n+1)}{2}}=\frac{n+2}{2(n+1)}$
