GMAT数学DS题求解

luting0616

How many people are directors of both Company X and Company R?

1)       There were 17 directorspresent at a joint meeting of the directors of Company K and Company R, and nodirectors were absent

2)       Company K has 12 directors andCompany R has 8 directors

mycrofthall

C吧。任意单独条件都求不出。

luting0616

mycrofthall 发表于 2014-10-15 22:33
C吧。任意单独条件都求不出。

求解释