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Probability-Urn-I-contains-5-red-and-3-green-balls-Urn-II-contains-2-red-and-7-green-balls-One-balls-is-transferred-at-random-from-urn-I-to-urn-II-After-stirring-1-ball-is-chosen-from-urn-II-




Question Number 135352 by EDWIN88 last updated on 12/Mar/21
Probability  Urn I contains 5 red and 3 green balls. Urn II  contains 2 red and 7 green balls. One balls  is transferred (at random) from urn I to urn II  . After stirring , 1 ball is chosen from urn II.  What is probability that the (final) ball is  green?
$$\underline{\mathrm{Probability}} \\ $$$$\mathrm{Urn}\:\mathrm{I}\:\mathrm{contains}\:\mathrm{5}\:\mathrm{red}\:\mathrm{and}\:\mathrm{3}\:\mathrm{green}\:\mathrm{balls}.\:\mathrm{Urn}\:\mathrm{II} \\ $$$$\mathrm{contains}\:\mathrm{2}\:\mathrm{red}\:\mathrm{and}\:\mathrm{7}\:\mathrm{green}\:\mathrm{balls}.\:\mathrm{One}\:\mathrm{balls} \\ $$$$\mathrm{is}\:\mathrm{transferred}\:\left(\mathrm{at}\:\mathrm{random}\right)\:\mathrm{from}\:\mathrm{urn}\:\mathrm{I}\:\mathrm{to}\:\mathrm{urn}\:\mathrm{II} \\ $$$$.\:\mathrm{After}\:\mathrm{stirring}\:,\:\mathrm{1}\:\mathrm{ball}\:\mathrm{is}\:\mathrm{chosen}\:\mathrm{from}\:\mathrm{urn}\:\mathrm{II}. \\ $$$$\mathrm{What}\:\mathrm{is}\:\mathrm{probability}\:\mathrm{that}\:\mathrm{the}\:\left(\mathrm{final}\right)\:\mathrm{ball}\:\mathrm{is} \\ $$$$\mathrm{green}?\: \\ $$
Answered by liberty last updated on 12/Mar/21

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