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Math Help - Selecting bag A

  1. #1
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    Selecting bag A

    Bag A contains 6 green discs and 4 red discs
    Bag B contains 3 green discs and 7 red discs
    I am twice as likely to select a disc from bag A as i am from bag B
    write down the probability that I will select from bag A?
    let probability of bag B is P, then 2P + P= 1 m P=1/3
    Answer is 2/3 , is this correct ?
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  2. #2
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    Re: Selecting bag A

    Quote Originally Posted by nazz View Post
    I am twice as likely to select a disc from bag A as i am from bag B
    Was this stated in the question? If so I think you are missing some information. Or the red disks are smaller than the green disks so when you put your hand in to pick one you have a higher chance of getting a green one than if they were all the same size.
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  3. #3
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    Re: Selecting bag A

    Given
    Bag A contains 6 green discs and 4 red discs
    Bag B contains 3 green discs and 7 red discs
    Question
    I am twice as likely to select a disc from bag A as i am from bag B

    write down the probability that I will select from bag A?
    My answer
    let probability of bag B is P, then 2P + P= 1 m P=1/3
    Answer is 2/3 , is this correct ?
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  4. #4
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    Re: Selecting bag A

    Yea I'd say that's correct.
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