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题库 / Prep2007E1-PS-134
A 4-person task force is tobe formed from the 4 men and 3 women who work in Company G's human resourcesdepartment. If there are to be 2 men and2 women on this task force, how many different task forces can be formed?
14
18
35
56
144
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四个男人当中选两个, C=4!/2!(2!), 等于6.
三个女人里面选两个，C=3!/2!(1!), 等于3
所以最后3✖️6=18
答案B