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There are n urns each containing (n+1) balls such that 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…, n and w denotes the event of getting a white ball. IfP(u_i)=c, where c is a constant then P(u_n/w) is equal to

A

1

B

`(2)/(3)`

C

`(1)/(4)`

D

`(3)/(4)`

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A
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