Wednesday, February 3, 2010

Calculating Combinations With Repetition Online Calculating Factorials, Combinations, And Permutations.?

Calculating factorials, combinations, and permutations.? - calculating combinations with repetition online

What is the simple equation, for example. Calculation of the total number of combinations of possible permutations (or) of 4 selected items of 7 elements. I think the answer is 35, but the long way.

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2 comments:

  1. Sean HFebruary 3, 2010 at 6:39 PM

    Is

    7! / (4 3!) = 7 * 6 * 5 / (3 * 2) = 35.

    In general, the number of select options to kn elements:

    No! / (K! (Nk)!)

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  2. broken_g...February 4, 2010 at 12:08 AM

    Everything you need to do is to think that way

    several ways to collect to get 1 point * number of opportunities to point # 2 * number of ways to collect, move the item # 3 * several options for your point # 4

    In this case, 7 * 6 * 5 * 4. they are to receive the 840 possibilities.

    I think ... I hope that helped

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