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Math Help - Simple probability question

  1. #1
    VII
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    Simple probability question

    Hi There's a 15% chance to get a blue.

    I've got 3 chances to hit blues. What's the chance I hit exactly 2/3 blues?
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  2. #2
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    Re: Simple probability question

    Quote Originally Posted by VII View Post
    Hi There's a 15% chance to get a blue.
    I've got 3 chances to hit blues. What's the chance I hit exactly 2/3 blues?

    Please rewrite your question in much more complete details.
    As written, it is too vague to answer.
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  3. #3
    VII
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    Re: Simple probability question

    There's some sweets in a bag. There's a 15% chance to get a blue sweet.
    I will take a sweet out, and put it back in.
    If take a sweet out and put it back 3 times, what's the chance 2/3 of those sweets will be blue?
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  4. #4
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    Re: Simple probability question

    Quote Originally Posted by VII View Post
    There's some sweets in a bag. There's a 15% chance to get a blue sweet. I will take a sweet out, and put it back in.
    If take a sweet out and put it back 3 times, what's the chance 2/3 of those sweets will be blue?
    Simple binomial probability: \binom{3}{2}(.15)^2(.85).
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  5. #5
    VII
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    Re: Simple probability question

    I don't understand that >.>
    What's the % chance of getting 2/3 blues?
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  6. #6
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    Re: Simple probability question

    Quote Originally Posted by VII View Post
    I don't understand that >.>
    What's the % chance of getting 2/3 blues?
    Reply #4 contains the exact answer.
    It is your job to do the calculation. This is not a homework service.

    If you do not understand how to evaluate a binomial coefficient, \binom{N}{k} then you have no business trying this problem.
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