Question

    A bag contains ‘x’ red balls and 4 green balls. If the

    probability of getting a red ball is 3/5, then find the probability of getting different coloured balls when two balls are drawn randomly from the bag.
    A 2/5 Correct Answer Incorrect Answer
    B 8/15 Correct Answer Incorrect Answer
    C 4/9 Correct Answer Incorrect Answer
    D 5/16 Correct Answer Incorrect Answer
    E 1/3 Correct Answer Incorrect Answer

    Solution

    x/(x + 4) = 3/5
    → 5x = 3x + 12 → x = 6
    Total balls = 10
    P = ( 6 C 1 × 4 C 1 )/( 10 C 2 ) = (6 × 4)/45 = 24/45 = 8/15

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