GWD-TT 5套Q3

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?

A.     20

B.     40

C.     50

D.     80

E.      120

这道题我选E,答案选D我看了讨论贴,知道D的原因了,但是我觉得我的没错:

C(5,1)*C(4,1)*C(3,1)*A(2,2)=120,原因是5对,4对,3对,各选一个,但是每队有两人,即乘2...

NN指路