Results 1 to 3 of 3

Math Help - [SOLVED] Simple Probability

  1. #1
    Member
    Joined
    Jun 2008
    From
    Plymouth
    Posts
    120
    Thanks
    5

    [SOLVED] Simple Probability

    You have a box with 10 white and 5 black balls. What is the probability that after 5 draws you have 2 white and 3 black. I think it's \frac{C_{10}^{2} \times C_{5}^{3}}{C_{5}^{15}}.
    Is this correct.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,712
    Thanks
    1642
    Awards
    1
    Quote Originally Posted by fobos3 View Post
    You have a box with 10 white and 5 black balls. What is the probability that after 5 draws you have 2 white and 3 black. I think it's \frac{C_{10}^{2} \times C_{5}^{3}}{C_{5}^{15}}.
    Is this correct.
    The idea is correct but be careful in your notation.
    \color{red}\frac{C_{2}^{10} \times C_{3}^{5}}{C_{5}^{15}}.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Grandad's Avatar
    Joined
    Dec 2008
    From
    South Coast of England
    Posts
    2,570
    Thanks
    1

    Probability

    Hello fobos3
    Quote Originally Posted by fobos3 View Post
    You have a box with 10 white and 5 black balls. What is the probability that after 5 draws you have 2 white and 3 black. I think it's \frac{C_{10}^{2} \times C_{5}^{3}}{C_{5}^{15}}.
    Is this correct.
    Yes.

    Grandad

    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Simple probability problem
    Posted in the Discrete Math Forum
    Replies: 4
    Last Post: May 4th 2010, 01:13 PM
  2. [SOLVED] Simple Probability has me stumped
    Posted in the Statistics Forum
    Replies: 25
    Last Post: August 28th 2009, 01:39 PM
  3. [SOLVED] Simple probability question
    Posted in the Statistics Forum
    Replies: 2
    Last Post: March 24th 2009, 05:09 AM
  4. [SOLVED] Simple Probability Question (Programming)
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: February 23rd 2009, 05:55 PM
  5. [SOLVED] Simple Probability Help
    Posted in the Statistics Forum
    Replies: 7
    Last Post: February 23rd 2009, 03:50 PM

Search Tags


/mathhelpforum @mathhelpforum