Results 1 to 4 of 4

Math Help - Ball-bags

  1. #1
    Member
    Joined
    Sep 2007
    Posts
    75

    Ball-bags

    OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

    I have a bag of three balls. One of them is green and the others are either red or green. If I select one ball at random, what is the chance that it will be red?

    OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Dec 2008
    From
    Scotland
    Posts
    901
    Quote Originally Posted by Obsidantion View Post
    OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

    I have a bag of three balls. One of them is green and the others are either red or green. If I select one ball at random, what is the chance that it will be red?

    OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
    I don't know, but I suggest you take a trip to your Doctor. It could be serious.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member Greengoblin's Avatar
    Joined
    Feb 2008
    From
    UK
    Posts
    182
    Quote Originally Posted by Mush View Post
    I don't know, but I suggest you take a trip to your Doctor. It could be serious.
    haha good advice
    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 Obsidantion View Post
    OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO



    I have a bag of three balls. One of them is green and the others are either red or green. If I select one ball at random, what is the chance that it will be red?


    OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
    I will assume you're not color blind.

    Calculate the probability that your bag looks like each of the following:

    O O O

    O O O

    O O O

    Then calculate the probability of getting a O from each of those bags.

    For each bag calculate (probability of bag)(probability of O from that bag). Add the results.

    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Balls in bags.
    Posted in the Statistics Forum
    Replies: 1
    Last Post: July 27th 2011, 07:17 PM
  2. linear map open iff image of unit ball contains ball around 0
    Posted in the Differential Geometry Forum
    Replies: 2
    Last Post: May 25th 2010, 02:15 AM
  3. Bags with balls.
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: May 5th 2010, 10:25 AM
  4. Marbles in Bags
    Posted in the Statistics Forum
    Replies: 1
    Last Post: January 17th 2010, 12:05 AM
  5. Two bags with 100 balls each, probability of sum >80
    Posted in the Advanced Statistics Forum
    Replies: 14
    Last Post: January 15th 2008, 10:41 AM

Search Tags


/mathhelpforum @mathhelpforum