Introduction to Sets and Venn- Diagram

Things to remember

• The numbers of elements in a set are  called its Cardinal number of Set.
• A set having a finite number of elements is called a Finite Set.
• A set having only one element is called Singleton Set.
• A set with no element is called the Null Set or Empty Set.
• The two sets having at least one element common is said to be Intersecting Set.
• The two sets having no element common are said to be Disjoint Set.
• The two sets having the same number of elements is said to be Equivalent Set.
• Two sets are said to be equal if they have same elements.