The Venn diagram shows 2 intersecting circles, one labeled Africa 93 and the other labeled Asia 155. The area of intersection is labeled 70.

A proper Venn diagram depicts every combination of intersections. Rejiggering the layout won’t help. Every four-circle drawing suffers the same flaw. To see why, start with a single circle and ...

A Venn diagram can show data sets ... the overlap is empty or the circles do not overlap. The overlap between sets is called the intersection. The notation for the intersection of set A and ...