Results 1 to 5 of 5

Math Help - Range of a 3-digit number set is 000-999

  1. #1
    Newbie
    Joined
    Feb 2011
    Posts
    3

    Wink Range of a 3-digit number set is 000-999

    Assume the range of a 3-digit number set is 000-999. What is the probability, in a randomly selected number, that all three digits will be the same? (i.e. 222, 333, 444, etc).

    Much appreciated.

    ~CG
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor harish21's Avatar
    Joined
    Feb 2010
    From
    Dirty South
    Posts
    1,036
    Thanks
    10
    The numbers where all three digits are same are: 000,111,222,333,444,555,666,777,888,999.

    So what is the probability?!
    Last edited by mr fantastic; February 16th 2011 at 01:37 AM.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Feb 2011
    Posts
    3
    I realize that those are all the numbers where the three digits are the same, 10/999? There are only 10 numbers where all three digits are the same, but there are 999 unique numbers (000, 001, 002...997, 998, 999, etc).
    Last edited by mr fantastic; February 16th 2011 at 01:37 AM.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor harish21's Avatar
    Joined
    Feb 2010
    From
    Dirty South
    Posts
    1,036
    Thanks
    10
    If 000 is also included, then there are 1000 numbers altogether.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Feb 2011
    Posts
    3
    It is included. So is the probability then 10/1000? Or 1% (.01)?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Digit sum & digit product of number x
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 19th 2011, 08:07 AM
  2. 4 digit PIN number - please help
    Posted in the Statistics Forum
    Replies: 4
    Last Post: February 12th 2010, 05:47 AM
  3. 10 digit number
    Posted in the Number Theory Forum
    Replies: 5
    Last Post: November 2nd 2009, 01:51 PM
  4. two-digit number
    Posted in the Algebra Forum
    Replies: 6
    Last Post: October 10th 2009, 07:59 AM
  5. 6 digit number
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: May 10th 2009, 08:10 AM

Search Tags


/mathhelpforum @mathhelpforum