GMAT
题目
There are 16 teams in a tournament. If during the first round, each team plays every other team exactly once, how many games will be played in the first round?
解析
比赛的总场数等于从16支队伍中选出不同的两队组合的数量，
也就是组合数\(C_{16}^2 = \frac{16!}{2!14!} = 120\)。
答案：C
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