Derek1988 wrote:
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?
A. 1900
B. 3600
C. 2400
D. 180
E. 5400
Kudos for the first who answers with the right answer
If each team were to play a game against the rest of the teams, we would have 20 * 19 amount of games in total. However, this results in each team facing each other twice since we counted both A faces B and B faces A. To eliminate the double-counting, we divide that value by 2 to get 10*19 = 190 games played. Finally, we multiply that by 10 to get 1900 games in total for facing each other 10 times instead of once.
Ans: A
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