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Paragraph:
There are $n$ urns each containing $(n+1)$ balls such that the ith urn contains $i$ white balls and $(n+1-i)$ red balls. Let $u_i$ be the event of selecting ith urn, $i=1,2,3, \ldots, n$ and $W$ denotes the event of getting a white balls.Question:
If $P\left(u_i\right) \propto i$, where $i=1,2,3, \ldots, n$, then $\lim _{n \rightarrow \infty} P(W)$ is equal to
MathematicsProbabilityJEE Main
Options:
  • A
    1
  • B
    $\frac{2}{3}$
  • C
    $\frac{1}{4}$
  • D
    $\frac{3}{4}$
Solution:
2149 Upvotes Verified Answer
The correct answer is:
$\frac{2}{3}$

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