Arrangements and Selections
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Arrangements and Selections

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  • Nota de Estudos
  • Rever Tópicos
    Sarah O.
    IE
    Sarah O.

    where did she get 56 from?

    Sarah O.
    IE
    Sarah O.

    how did you get 56?

    Kushal G.
    flag-default-icon
    Kushal G.

    @lanigutteridge they refereed to a table

    Lani G.
    GB
    Lani G.

    how do you get 56?

    Bujjibabudora P.
    IN
    Bujjibabudora P.

    good

    Naveena G.
    IN
    Naveena G.

    Rosalie: it is 8!/(8-5)!5!.. hope this helps

    Danisile Ennie K.
    ZA
    Danisile Ennie K.

    wow l got it.

    Sara S.
    LB
    Sara S.

    I didn' t understand how you got 56 :/

    WILLIAM H.
    US
    WILLIAM H.

    n C r = n! / ((n - r)! * r! ). Given n=8 and r=5 you get 8! / ((8-5)! * 5!) = 8! / 3! * 5! = 8*7*6 / 3*2 with the 5! cancelling out on top and bottom. That yields 8*7*6/6 = 56.

    Amna J.
    GB
    Amna J.

    Good

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