Multiple Choice Questions on A box contains 3 ballons of 1 shape 4 ballons of 1 shape and 5 ballons of 1 shape Three ballons of t........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A box contains 3 ballons of 1 shape 4 ballons of 1 shape and 5 ballons of 1 shape Three ballons of t...........

Quantitative Aptitude ( CCS) Probability
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    A box contains 3 ballons of 1 shape, 4 ballons of 1 shape and 5 ballons of 1 shape. Three ballons of them are drawn at random, what is the probability that all the three are of different shape?

    1/11

    Incorrect Answer

    2/11

    Incorrect Answer

    3/11

    Correct Answer

    4/11

    Incorrect Answer
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    Explanation:

    Total=3+4+5=12 
    n(s)=12c3=220 
    n(e)=3c1 * 4c1 * 5c1 =60 
    p=60/220=3/11

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