Two eleven-member basketball teams play a game.After the game,each of the members of the winning team shakes hands once with each member of both teams.How many handshakes take place?
问题描述：
Two eleven-member basketball teams play a game.After the game,each of the members of the winning team shakes hands once with each member of both teams.How many handshakes take place?
答
排列组合吧~22个人中选2个人任意组合
答
两个11人的篮球队进行一场比赛,比赛后,每名胜队的队员和两队的其他队员握手,问一共发生多少次握手;
22个取11组合;
=21+20+19+...+11=176;
共发生176次握手;