SAT, 04.02.2022 08:20 yashirachevalier

Bag a contains 3 red balls and 1 blue ball. A bag b contains 1 red ball and 1 blue ball. A ball is randomly picked from each bag. The ball from bag a is the placed into bag b and the ball from bag b is placed into bag a. What is the expected number (or mean) of red balls in the bag a?.

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Bag a contains 3 red balls and 1 blue ball. A bag b contains 1 red ball and 1 blue ball. A ball is r...