Results 1 to 4 of 4

Math Help - game probability

  1. #1
    Senior Member
    Joined
    Jan 2009
    Posts
    381

    game probability

    A game is played by players taking turns toss a die . If a player gets 2,3,4 or 5 , then it would be his first score and the next player takes over . If the score is 1 or 6 , the player is given an extra toss and his score would be the sum of the two scores obtained . Events A and B are defined as follows .

    A=The score is 5,6,7,8 or 9 .

    B=The player tosses twice .

    Show that p(A)=1/3 . Find P(B) and P(AnB)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by thereddevils View Post
    A game is played by players taking turns toss a die . If a player gets 2,3,4 or 5 , then it would be his first score and the next player takes over . If the score is 1 or 6 , the player is given an extra toss and his score would be the sum of the two scores obtained . Events A and B are defined as follows .

    A=The score is 5,6,7,8 or 9 .

    B=The player tosses twice .

    Show that p(A)=1/3 . Find P(B) and P(AnB)
    I suggest drawing a tree diagram. By the way, Pr(B) should be easy ....

    If you need more help, please show what you could do and say where you're stuck.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member
    Joined
    Jan 2009
    Posts
    381
    Quote Originally Posted by mr fantastic View Post
    I suggest drawing a tree diagram. By the way, Pr(B) should be easy ....

    If you need more help, please show what you could do and say where you're stuck.
    i am not sure how to draw a tree diagram for such questions , i tried counting the possibilities but just to no avail . Can you get me started ?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by thereddevils View Post
    i am not sure how to draw a tree diagram for such questions , i tried counting the possibilities but just to no avail . Can you get me started ?
    The first two branches are "2,3,4 or 5" and "1, 6". And only one of these branches will have other branches coming from it ....
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 10
    Last Post: January 21st 2011, 11:47 AM
  2. Probability Game
    Posted in the Statistics Forum
    Replies: 0
    Last Post: June 10th 2008, 12:48 PM
  3. Some probability in the game Big 2
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: November 15th 2007, 10:44 PM
  4. probability game
    Posted in the Statistics Forum
    Replies: 2
    Last Post: January 5th 2007, 06:14 PM
  5. Please!!help!! probability game
    Posted in the Statistics Forum
    Replies: 3
    Last Post: January 5th 2007, 10:02 AM

Search Tags


/mathhelpforum @mathhelpforum