A U B U C Math Venn Diagram

Since 7 students were taking a ss and ns course we know that n d n e 7 since we know there are 3 students in region 3 there must be. All region except a b the orange region is a b ex 1 5 5 method 1 draw appropriate venn diagram for each of the following. The complete venn diagram represents the union of a and b or a b.