A probability problem by Nirankush Singh
Probability
Level
pending
An urn contains 'm' white and 'n' black balls. Balls are drawn one by one till all balls are drawn. Probability that the second ball is white is __ ?
[The answer is being disputed.]
m/(m+n)
{m(m+1)}/{(m+n)(m+n-1)}
mn/{(m+n)(m+n-1)}
{n(m+n-10)}/{(m+n)(m+n-1)}
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