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  1. 2020-10-26, 11:20 AM (ISO 8601) - Top - End - #1
    KarlMarx
    KarlMarx is offline
    Dwarf in the Playground
     
    RangerGuy
    Join Date
    Jul 2016
    Location
    Earth

    Default Distinct subsets question

    For a set of n elements, how many distinct subsets of x elements are there, 0<x<n?
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  2. 2020-10-26, 11:43 AM (ISO 8601) - Top - End - #2
    warty goblin
    warty goblin is online now
    Titan in the Playground
    Join Date
    May 2007
    Location
    Tail of the Bellcurve
    Gender
    Male

    Default Re: Distinct subsets question

    This is just n choose x, which is n!/(x!(n - x)!)
    Blood-red were his spurs i' the golden noon; wine-red was his velvet coat,
    When they shot him down on the highway,
    Down like a dog on the highway,
    And he lay in his blood on the highway, with the bunch of lace at his throat.

    Alfred Noyes, The Highwayman, 1906.
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