Mathematics, 14.07.2020 19:01 andydiaz1227

There are n urns of which the r th contains r-1 red ball and n-r magenta balls. you pick an urn at random and remove two balls at random without replacement. Find the probability that: (a) the second balls is magenta; (b) the second balls is magenta; given that the first is magenta.

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There are n urns of which the r th contains r-1 red ball and n-r magenta balls. you pick an urn at r...