Results 1 to 5 of 5

Math Help - probability of having a dog

  1. #1
    Junior Member
    Joined
    Feb 2009
    Posts
    41

    probability of having a dog

    Suppose that 48% of people own dogs. If you pick two people at random, what is the probability that they both own a dog?

    I don't know how to approach this problem properly . Any suggestion would be appreciated!
    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 skorpiox View Post
    Suppose that 48% of people own dogs. If you pick two people at random, what is the probability that they both own a dog?

    I don't know how to approach this problem properly . Any suggestion would be appreciated!
    Assuming independence, (0.48)(0.48).

    (I've also assumed that the two people have not been selected at random from a dog show ....)
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Feb 2009
    Posts
    41
    just for curiosity, what would be the probability that at least one of them has a dog?
    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 skorpiox View Post
    just for curiosity, what would be the probability that at least one of them has a dog?
    Pr(at least one) = 1 - Pr(none) = 1 - (0.52)^2
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Feb 2009
    Posts
    41
    thanks for your time Mr. fantastic
    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. Replies: 3
    Last Post: May 29th 2010, 07:29 AM
  3. fundamental in probability & convergence with probability 1
    Posted in the Advanced Statistics Forum
    Replies: 3
    Last Post: February 23rd 2010, 09:58 AM
  4. Replies: 1
    Last Post: February 18th 2010, 01:54 AM
  5. Replies: 3
    Last Post: December 15th 2009, 06:30 AM

Search Tags


/mathhelpforum @mathhelpforum