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Permutation meaning and example

  1. Jan 1, 2013 #1
    what is the permutation?
    and like what example?
    anyone knows?
     
  2. jcsd
  3. Jan 1, 2013 #2

    HallsofIvy

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    Do you mean "what is a permutation"? A permutation of a given list is simply a rearrangement of the list. For example, if the original list is "abc" then permutations are "acb", "bac", "bca", "cab", "cba", and, for completeness, we include the orignal list, "abc" as a permutation.
     
  4. Jan 1, 2013 #3
    i see,
    so its just rearrange the list into random right?
     
  5. Jan 1, 2013 #4

    I like Serena

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    Formally, a permutation is a 1-1 map of a set onto itself.
     
  6. Jan 1, 2013 #5

    phinds

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    No, it is NOT random. It is a set of all possible arrangements.

    For combinations, on the other hand, order does not matter, so the combinations of abc are abc OR bca OR cab, etc --- but they are all counted as the same thing.
     
  7. Jan 11, 2013 #6
    we can define permutation as-
    1.NUMBER OF ORDERED SELECTION OF "K" OBJECTS OUT OF "N" DISTINCT OBJECTS WITHOUT REPETITION.OR.;
    2.ORDERED SAMPLING OF K OBJECTS OUT OF N DISTINCT OBJECTS WITHOUT REPLACEMENT.OR
    3.NUMBER OF PERMUTATION(ORDERED SAMPLING)OF K OBJECTS OUT OF N DISTINCT OBJECTS WITHOUT REPETATION...
     
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