New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    A bag contains 3 black and 9 white balls. One

    ball is drawn at random. What is the probability that the ball drawn is white?
    A 4/7 Correct Answer Incorrect Answer
    B 3/4 Correct Answer Incorrect Answer
    C 3/7 Correct Answer Incorrect Answer
    D 1/2 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let number of balls = (3 + 9) = 12
    Number of white balls = 9
    P (drawing a white ball) = 9/12 = 3/4

    Practice Next