In a group of 60 students, 12 students take Algebra I, 18 students take Algebra II, and 8 students take both subjects. How many students don't take either of these subjects?
well if 12.students tAke algebra I and 18 tAke algebra II and 8 of these students are in both classes, that means we are actually counting these.8 students twice. So it would appear there are 30 but minus the 8 we counted twice and we get 22. So 60 - 22 = 38
