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

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by Gmat_mission » Sun Jan 17, 2021 10:51 am
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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

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

by Scott@TargetTestPrep » Tue Jan 26, 2021 4:38 am
Gmat_mission wrote: ↑
Sun Jan 17, 2021 10:51 am
 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

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