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    Question

    There are two bags P and Q. Bag P contains 5 Yellow and

    6 Green balls while bag Q contains 6 Yellow and 5 Green balls. As a part of an experiment, a fair dice is rolled. If the face 2 or 5 turns up, a Green ball is taken from bag P and is then placed into bag Q. If any other face turns up, a Green ball is taken from bag Q and is then placed into bag P. The experiment is performed twice. What is the probability that total number of balls in bag P is not more than that in Bag Q after performing the experiments?
    A 5/12 Correct Answer Incorrect Answer
    B 4/11 Correct Answer Incorrect Answer
    C 5/9 Correct Answer Incorrect Answer
    D 4/9 Correct Answer Incorrect Answer

    Solution

    Bag P will not have more number of balls than bag Q if we exclude the case where both the experiments result in placing Green balls in bag P. So, probability of bag P having total number of balls not more than Bag Q ┬а = 1 тАУ Probability of getting (1 or 3 or 4 or 6) during both the experiments = 1 тАУ 4/6 ├Ч 4/6 = 5/9 ┬а

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