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(Choose 1 answer)
☐ A
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
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B. 0.338
C. 0.819
D. 0.543
E. None of the other choices is correct
