Question 461973
2) Bowl Cl contains 3 red and 7 blue chips and bowl C2 contains 8 red and 2 blue chips. All chips are identical in size and shape. A die is cast and bowl Cl is selected if five or six spots show on the side that is up; otherwise, bowl C2 is selected. The selected bowl is handed to another person and one chip is taken at random. Suppose that the selected chip is red, what is the probability the selected bowl was Cl? 
in three draws 3 + 8 + 8 = 19 total red chips, 2 eights because drawing that bowl is twice as likely.
3/19 the probability the selected bowl was Cl.
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Ed