Venn Diagram
Definition
A pictorial or graphical representation of sets using overlapping circles within a rectangle (Universal Set) to show the relationships (union, intersection, difference) between sets. Named after John Venn.
Example
"In a class of 50 students, 30 study Accounts and 25 study Law. If 10 study both, a Venn Diagram helps visualize and calculate: only Accounts = 20, only Law = 15, Both = 10."