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QR question about permutation and combination


Full Member
Jun 9, 2014
  1. Pre-Dental
    Order usually matters in things like "how many different ways can you do something". Ex: people standing in line, different title positions (President, VP, treasurer...), people going through different rooms.

    Combinations are then where it wouldnt matter. Things like the books you choose in a set (obviously if you pick Book A before Book B, it doesnt matter), how many people you can bring to a ballgame (doesnt matter if Matt, John, Bill went or Bill, John, Matt....same people!!)

    Just some examples I thought off the top of my head!
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    Lifetime Donor
    15+ Year Member
  • Mar 12, 2005
    New York City
    1. Non-Student
      When solving problems for permutations and combination, how would you figure out if order does or does not matter?
      I would greatly appreciate your help with a few examples!

      To solve these type of problems, read the question carefully.
      For example: how many ways you can 3 people out of 10 finish a race?
      This is a combination.

      If the question were: how many ways can 3 people finish a race 1st, 2nd and third?
      This is now a permutation since the order in which the 3 players finish a race is important.

      Hope this helps..
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