Results 1 to 2 of 2

Math Help - Three tosses of a fair coin

  1. #1
    Member
    Joined
    Oct 2008
    Posts
    131

    Three tosses of a fair coin

    In three tosses of a fair coin, what is the probability of getting at least 2 heads? (A fair coin is equally likely to come up heads or tails.)

    Is the answer 3/8, 5/8, 7/8, or 1/2? how do you go about solving this? (I came up with 3/8).
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28

    Re: Three tosses of a fair coin

    I would pick 1/2, 'at least 2' means the p(2)+p(3)

    Draw a tree diagram you will see.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Sequence of coin tosses.
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: June 26th 2011, 11:53 AM
  2. In 200 tosses of a coin,
    Posted in the Statistics Forum
    Replies: 10
    Last Post: January 1st 2010, 04:43 AM
  3. Replies: 2
    Last Post: December 17th 2008, 05:22 AM
  4. When is a fair coin toss not fair?
    Posted in the Advanced Statistics Forum
    Replies: 3
    Last Post: November 12th 2008, 08:48 AM
  5. Probability - coin tosses
    Posted in the Advanced Statistics Forum
    Replies: 5
    Last Post: April 30th 2008, 02:26 PM

Search Tags


/mathhelpforum @mathhelpforum