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  • Gate question: detailed answer?

    qwerty123

    qwerty123

    @qwerty123-ZuiVHD
    Updated: Oct 18, 2024
    Views: 1.0K
    A bag contains 10 blue marbles, 20 green marbles and 30 red marbles. A marble is drawn from the bag, its colour recorded and it is put back in the bag. This process is repeated 3 times. The probability that no two of the marbles drawn have the same colour is
    a)1/36 b)1/6 c)1/4 d)1/3
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Replies

  • nareshkumar6539

    Member • Jun 4, 2012

    I think answer is a(1/36) but i am not sure it is 100% correct

    after seeing the colour of marble again he put it in the bag so again total number of marbles is 60
    Required Answer is=P(B)*P(G)*P(R)
    Probability for selecting Blue marble P(B)=10/60
    Probability for selecting Green marble P(G)=20/60
    Probability for selecting Red marble P(R)=30/60
    he did this process 3 times one after the other so multiply the above is required answer
    1/36
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  • pavani abburi

    Member • Jun 4, 2012

    yes as 3 colors are different(independent) you are correct
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