Question

    A bag contains 7 green balls, 5 blue balls, and 10 yellow balls. A box contains 3 green balls and 8 yellow balls. A ball is randomly drawn from the box and put into the bag, and then a ball is randomly drawn from the bag. Find the probability that the ball is of yellow color.

    A 69/155 Correct Answer Incorrect Answer
    B 59/165 Correct Answer Incorrect Answer
    C 49/135 Correct Answer Incorrect Answer
    D 59/122 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Case 1: Let the ball drawn from the box be yellow. Probability of drawing a yellow ball from the bag = Case 2: Let the ball drawn from the box be green. Probability of drawing a yellow ball from the bag =  Therefore, required probability =

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