In College X in the United States, there are 200 students in a class, of which 80 are female.

[Gmat_mission]

In College X in the United States, there are 200 students in a class, of which 80 are female. If 10% of the class consists of female non-American students and 3/5th of the class are American students, how many of the students in the class are male American students?

A. 20
B. 40
C. 60
D. 80
E. 120

Answer: C

Source: e-GMAT

[Scott@TargetTestPrep]

In College X in the United States, there are 200 students in a class, of which 80 are female. If 10% of the class consists of female non-American students and 3/5th of the class are American students, how many of the students in the class are male American students?

A. 20
B. 40
C. 60
D. 80
E. 120

Answer: C

Solution:

We see that there are 80 female students in the class and hence, there are 200 - 80 = 120 male students. Furthermore, we see that 200 x 0.1 = 20 students are female non-American students and 200 x 3/5 = 120 students are American students. Therefore, there must be 200 - 20 - 120 = 60 male non-American students and hence there are 120 - 60 = 60 male American students.

Answer: C