gwd-5-3

叮叮当当

Q3:

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? C¹₅C¹₄C¹₆

A.     20

B.     40

C.     50

D.     80

E.      120

the answer is D,mine is E

yaojianbin33

C(5,3)C(2,1)C(2,1)C(2,1)=80

叮叮当当

thanks !!!!!!