Look it is very simple.
If we have teams then there are ways for teams to play each other in the order (Home, Away).
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.