Menu
Home / Arithmetic Aptitude / Probability :: Discussion

Discussion :: Probability

  1. A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If four marbles are picked at random, what is the probability that none is blue?
    2. A.
    17/91
    B.
    33/91
    C.
    51/91
    D.
    65/91
    E.
    None of these

    View Answer

    Workspace

    View Answer

    Answer : Option B

    Explanation :

    Given that there are three blue marbles, four red marbles, six green marbles and two yellow marbles. When four marbles are picked at random, then the probability that none is blue is = ¹²Câ‚„/¹âµCâ‚„ = (12 * 11 * 10 * 9)/(15 * 14 * 13 * 12) = 33/91

Write your comments here:

Be The First To Comment