gmat数学题
Inacorporation,50percentofthemaleemployeesand40percentofthefemaleemployeesareatleast35yearsold.If42percentofalltheemployeesareatleast35yearsold,whatfractionoftheemployeesinthecorporationarefemales?
A.x053/5
B.x052/3
C.x053/4
D.x054/5
E.x055/6