Results 1 to 2 of 2

Math Help - Inclusion - Exclusion Principle

  1. #1
    Super Member
    Joined
    Feb 2008
    Posts
    535

    Inclusion - Exclusion Principle

    Let S = {n1*a1, n2*a2, ..., nk*ak}, and let r be a natural number such that there is at
    least one r-combination of S. Show that in applying the inclusion-exclusion principle to determine the number of r-combinations of S, one has A1 n A2 n ... n Ak = EmptySet.

    n = intersection

    Thanks in advance for any help on this one...
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,957
    Thanks
    1781
    Awards
    1
    Quote Originally Posted by jzellt View Post
    Let S = {n1*a1, n2*a2, ..., nk*ak}, and let r be a natural number such that there is at least one r-combination of S. Show that in applying the inclusion-exclusion principle to determine the number of r-combinations of S, one has A1 n A2 n ... n Ak = EmptySet.
    I have absolutely no idea what any of that means.
    That notation is completely "off the wall".
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Inclusion–exclusion principle
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: November 22nd 2011, 06:45 AM
  2. Inclusion Exclusion Principle Help!
    Posted in the Discrete Math Forum
    Replies: 0
    Last Post: September 28th 2011, 03:43 AM
  3. NOT version of the Inclusion-Exclusion principle
    Posted in the Discrete Math Forum
    Replies: 5
    Last Post: August 20th 2011, 02:22 PM
  4. inclusion exclusion principle help!
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: August 9th 2011, 07:17 AM
  5. Principle of Inclusion of Exclusion
    Posted in the Statistics Forum
    Replies: 2
    Last Post: December 10th 2008, 01:15 PM

Search Tags


/mathhelpforum @mathhelpforum