Question

In a class of 200 students, 120 students take german, and 100 study french. if a student must study at least one of these languages, what percent of the students study french but not german

Answer 1

U=200
n(G)=120
n(F)=100
n(GnF)=x
U=n(G)+n(F)-n(GnF)
200=120+100-x
x=20
French but not German is 100-20=80
percentage = 80/200 *100%= 40%