To identify the complement of a set \(P\) on a Venn diagram: \(P'\) is the region outside the circle that represents set \(P\).

One could reasonably argue that beyond four sets of elements, Venn diagrams lose their utility. The four-ellipse image is already pretty chaotic. Maybe for five-plus sets we should abandon visual ...

This is the total of the people that are not in the set of people who own a cat (the complement of cat owners). Make sure that the number of elements in the Venn diagram is equal to the number of ...