Question

从男女乒乓球运动员各6人中选出4人进行男女混合双打表演赛，所有不同挑选运动员的方法有多少种？

Answer 1

24种吧！ 6个人可能是3男3女 C31乘以C31+C21乘以C21=13
还可能是4男2女 C41乘以C21+C31乘以C11=11 我觉得是这么做 不知道结果是不是这样 回头告诉我下答案 谢谢啦！

Answer 2

15*15=225种，高中知识，男的组合也是6个选2个，所以C62=6*5/2=15，女的组合也是C62=6*5/2=15,15*15=225种。！

Answer 3

I am very fond of music. When I am free, I often listen to my favorite songs from an old cassette recorder. At weekends, I usually go to music shops in the downtown areas to buy good CDs. Of the famous pop singers, I prefer Frank Sinatra, Elvis Presley, Madona and Paul MC Cartney.

Answer 4

18种