(Choose 1 answer)
A paper bag contains two red balls and one blue ball. A plastic bag contains three blue balls and one red ball. A coin is tossed. If it falls heads up, the paper bag is selected and a ball is drawn. If the coin falls tails up, the plastic bag is selected and a ball is drawn. If a red ball is selected, what is the probability that it came from the paper bag?
A. 0.727
B. 0.338
C. 0.819
D. 0.543
E. None of the other choices is correct
5
