If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible?
20
40
50
80
120
登录 或 注册 后可以参加讨论
全部選項:10C3 = 120 有至少一對夫妻: 5C1 x 8C1 = 40 120-40=80
全部選項:10C3 = 120
有至少一對夫妻: 5C1 x 8C1 = 40
120-40=80
登录 或 注册 后可以参加讨论