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Math Help - Permutations word problem check

  1. #1
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    Permutations word problem check

    In a nine team volleyball league, each team plays every other team twice, once at home and once away. How many games will be scheduled?

    To solve this do I simply use the nPr formula where n=9 and r=2 ?
    9P2=72

    I'm not sure if this is right or not though. If it isn't I'd appreciate it if someone could show me how to do it correctly.
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  2. #2
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    Look it is very simple.
    If we have n teams then there are (n\times n) -n ways for n teams to play each other in the order (Home, Away).
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