Results 1 to 2 of 2

Thread: Dividing objects in to groups.

  1. November 4th 2010, 06:14 PM #1
    Knassy
    Knassy is offline
    Newbie
    Joined
    Nov 2010
    Posts
    1

    Dividing objects in to groups.

    Hi,

    I hope I've put this in the right area. It's been a long time since I've been in school

    What I'd to know is the formula for how to solve a problem like:

    There are 30 unique hats/cars/whatever and you have to select 4. How many unique combinations of 4 hats/cars/whatever is there?

    I don't need an answer for this specific question, just a poke in the right direction.

    Thank you, this seems like a wonderful resource.
    Follow Math Help Forum on Facebook and Google+
  2. November 4th 2010, 06:57 PM #2
    harish21
    harish21 is offline
    MHF Contributor harish21's Avatar
    Joined
    Feb 2010
    From
    Dirty South
    Posts
    1,036
    Thanks
    10
    Without repitition, it would be:

    30C4 = \dbinom{30}{4} = \dfrac{30!}{4! \times (30-4)!}
    Follow Math Help Forum on Facebook and Google+
« Dice Probability | ANOVA: how can variances tell us if the means are different »

Similar Math Help Forum Discussions

  1. Number of ways of dividing things into groups...
    Posted in the Discrete Math Forum
    Replies: 3
    Last Post: October 4th 2011, 03:49 AM
  2. Dividing people into two groups
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: November 11th 2010, 12:05 PM
  3. Quotient Groups - Infinite Groups, finite orders
    Posted in the Advanced Algebra Forum
    Replies: 3
    Last Post: August 11th 2010, 07:07 AM
  4. Dividing into even groups
    Posted in the Statistics Forum
    Replies: 2
    Last Post: September 11th 2009, 08:39 AM
  5. Order of groups involving conjugates and abelian groups
    Posted in the Advanced Algebra Forum
    Replies: 5
    Last Post: February 5th 2009, 08:55 PM

Search Tags


/mathhelpforum @mathhelpforum