Results 1 to 2 of 2

Math Help - 3 children, probability of boy/girl = 0.5 EASY!

  1. #1
    Junior Member
    Joined
    Sep 2009
    Posts
    26

    3 children, probability of boy/girl = 0.5 EASY!

    Here is the problem (high school) Probability of getting a boy/girl is 0.5. And a family has 3 children. What is the probability that the oldest is a boy?
    Also what is the probability that the oldest is a boy and the youngest is a girl?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,607
    Thanks
    1574
    Awards
    1

    Re: 3 children, probability of boy/girl = 0.5 EASY!

    Quote Originally Posted by karldiesen View Post
    Here is the problem (high school) Probability of getting a boy/girl is 0.5. And a family has 3 children. What is the probability that the oldest is a boy?
    Also what is the probability that the oldest is a boy and the youngest is a girl?
    There are eight strings of B's and G's of length three.
    Half of them begin with a B. So what is the first answer?

    Two of them begin with a B and end with a G. So?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 7
    Last Post: May 17th 2011, 06:51 AM
  2. Probability of a girl?
    Posted in the Statistics Forum
    Replies: 2
    Last Post: March 18th 2010, 05:36 PM
  3. Replies: 3
    Last Post: December 6th 2009, 12:03 PM
  4. Replies: 4
    Last Post: June 9th 2009, 08:56 AM
  5. Easy probability that is not so easy for me!
    Posted in the Statistics Forum
    Replies: 1
    Last Post: May 9th 2009, 07:03 AM

Search Tags


/mathhelpforum @mathhelpforum