Question 805578: there are n teams in a league. if each team plays the others twice then how many matches are there in total? show it please!! thanks a lot
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! there are n teams in a league. if each team plays the others twice then how many matches are there in total?
------
Assume 3 teams:: a,b,c
Games: ab,ab,ac,ac,bc,bc------6 = 3^2-3
------
Assume 4 teams:: a,b,c,d
ab twice
ac twice
ad twice
bc twice
bd twice
cd twice
Games: 12 = 4^2-4
----------------
Assume n teams:::
Games:: n^2-n
===================
Cheers,
Stan H.
===================
|
|
|
