A committe of three people is to be chosen from four married couples, What is the number of different of committes what can be chosen if two people who are married to each other cannot both serve on the committee?
a. 16
b. 24
c. 26
d. 30
e. 32
怎么解啊?看的已经头晕了。正确答案是e
举报
我这种能好理解点
C(3,8)-C(1,4)*C(1,6)=56-24=32
发表回复
手机版|ChaseDream|GMT+8, 2025-1-14 21:23 京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
ChaseDream 论坛
© 2003-2023 ChaseDream.com. All Rights Reserved.