We are given 3 urns as follows: Urn A contains 3 red and 5 whitemarbles, Urn B contains 2 red and one white marble, Urn C contains2 red and 3 white marbles. Construct the probability tree. Supposethat a urn is randomly selected and a marble is drawn from theselected urn. If the marble is red what is the probability that itcame from urn A?
