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Basic probability question

  1. Mar 12, 2013 #1

    939

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    1. The problem statement, all variables and given/known data

    I am asked "evaluate the following factorials, permutations, and combinations". I am given a series of questions I understand, like P(10,3), 9!, etc. But then I have a series like this:

    9a3b4bfb4a4f.jpg

    2. Relevant equations


    9a3b4bfb4a4f.jpg


    3. The attempt at a solution

    I am not sure what this is, is it a combination, perhaps because there hasn't been any yet, and this is solved by 25C5?
     
  2. jcsd
  3. Mar 12, 2013 #2

    Bacle2

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    I'm not sure what you mean by a series, but usually , yes, it is 25C5.
     
  4. Mar 12, 2013 #3

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    Sorry, I ment a list, as in I have 10 questions, with a few looking like the one on the photo, a few looking like 9!, and a few looking like p(10,3). =)
     
  5. Mar 12, 2013 #4

    Bacle2

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    Oh, O.K, makes sense, maybe I was kind of thick.
     
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