Results 1 to 3 of 3

Thread: Probability and odds?

  1. Jun 14th 2011, 09:26 AM #1
    homeylova223
    homeylova223 is offline
    Senior Member
    Joined
    Dec 2010
    From
    CPT
    Posts
    304

    Probability and odds?

    A box contains 1 green, 2 yellow, and 3 red marbles. Two marbles are drawn at random without replacement. What are the odds of each event occurring?

    1. Drawing to different colours

    I am kind of confused on how to start this problem.
    Follow Math Help Forum on Facebook and Google+
  2. Jun 14th 2011, 09:43 AM #2
    Plato
    Plato is offline
    MHF Contributor
    Joined
    Aug 2006
    Posts
    21,091
    Thanks
    2569
    Awards
    1
    MHF Donor

    Re: Probability and odds?

    Quote Originally Posted by homeylova223 View Post
    A box contains 1 green, 2 yellow, and 3 red marbles. Two marbles are drawn at random without replacement. What are the odds of each event occurring?
    1. Drawing to different colours?
    I do not deal with odds.
    But I can give the probabilities.
    \mathcal{P}(\{G,Y\})=2\left(\frac{1}{6}\cdot\frac{ 2}{5}\right)~, \mathcal{P}(\{G,R\})=2\left(\frac{1}{6}\cdot\frac{ 3}{5}\right)~,~\&~, \mathcal{P}(\{R,Y\})=2\left(\frac{3}{6}\cdot\frac{ 2}{5}\right)~.

    To have two different colours, it must be one of those three.

    What is the answer?
    Last edited by Plato; Jun 14th 2011 at 10:24 AM.
    Follow Math Help Forum on Facebook and Google+
  3. Jun 14th 2011, 10:39 AM #3
    homeylova223
    homeylova223 is offline
    Senior Member
    Joined
    Dec 2010
    From
    CPT
    Posts
    304

    Re: Probability and odds?

    As my answer I got 11/4 I added up all the success probabilities subtracted by one to get the failures and then I did probability of success/ probability of failure.
    Follow Math Help Forum on Facebook and Google+
« Simple ANOVA question | What side does the critical region go on in a 1tailed associated test? »

Similar Math Help Forum Discussions

  1. Baisc probability/odds
    Posted in the Statistics Forum
    Replies: 2
    Last Post: Jul 14th 2010, 11:10 PM
  2. probability or odds, not sure which it is
    Posted in the Statistics Forum
    Replies: 1
    Last Post: Jun 27th 2010, 11:09 AM
  3. Odds and probability question!
    Posted in the Statistics Forum
    Replies: 1
    Last Post: Mar 17th 2010, 05:42 PM
  4. Odds vs Probability
    Posted in the Statistics Forum
    Replies: 2
    Last Post: Feb 8th 2010, 05:15 AM
  5. Odds in favor and probability
    Posted in the Statistics Forum
    Replies: 1
    Last Post: Dec 11th 2009, 04:52 AM

Search Tags


/mathhelpforum @mathhelpforum