Question

At Madison High school each student studies exactly one foreign language. Three fifths of the students taking Spanish, and one fourth of the remaining students take German. If all of the others take French, what percent of the students take French?
(A) 10
(B) 15
(C) 20
(D) 25
(E) 30

Answer 1

3/5 = 0.6 = 60%

60% of the total take Spanish.

That leaves 40% for the other languages.

1/4 of 40% is 10% that take German.

40% - 10% = 30% take French.