There are, in a certain league, 20 teams, and each team face another team for a total of 10 times. How many games are played in the season?  Choose the correct choice.
A) 1900	B) 3600	C) 2400	D) 180	E) 5400
1st team:190   2nd team:180   3rd team :170   Similarly the last team will play 0   therefore(190+180+170....10)   10(19+18+17+16....1)   10 (n(n+1)/2)=10(19*20/2)=1900   1900NSWER:1900
<result>A</result>
There are, in a certain league, 20 teams, and each team face another team for a total of 10 times. How many games are played in the season?