30% of the students taking algebra also take trigonometry and 50% taking trigonometry also take algebra. if 36 students take both subjects, how many students take only one of the two?

please explain! thanks!

Question

30% of the students taking algebra also take trigonometry and 50% taking trigonometry also take algebra. if 36 students take both subjects, how many students take only one of the two?

please explain! thanks! <3

anonymous · Answer

if 70%(.7*36=25.2) students take one
and .5 of students take one or the other (.5*25.2=12.6) 
app=13 students

anonymous · Answer

the answer is supposed to be 120 :o