GRE一道数学题求助

of the total number of students enrolled at university u in the fall of 2008, 3/8 were sophomores and 1/50 were biology majors. which of the following could be the total number of students enrolled at university u in the fall of 2008

A 7000
B 7040
C 7050
D 7100
E 7125
F 7200