Multiple Choice Questions on A box contains 5 green 4 yellow and 3 white marbles Three marbles are drawn at random What is the pr........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A box contains 5 green 4 yellow and 3 white marbles Three marbles are drawn at random What is the pr...........

Quantitative Aptitude ( CCS) Probability
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    A box contains 5 green , 4 yellow and 3 white marbles. Three marbles are drawn at random. What is the probability that they are not of the same colour ?

    40/44

    Incorrect Answer

    44/41

    Incorrect Answer

    41/44

    Correct Answer

    40/39

    Incorrect Answer
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    Explanation:

    Explanation :
    n(E) = 5C3+ 4C3+3C3 = 10+4+1 = 15
    n(S) = 12C3 = 220
    P = n(E)/ n(S) = 15/220 =3/44
    Required probability = 1-3/44 = 41/44

    By: Sandeep Dubey
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