A set is a collection of distinct objects. It is represented in curly brackets (or braces). A set can be written in two forms namely Roster form and Setbuilder form.
Different types of set are as follows: Empty set, Singleton set, Finite set, Cardinal set of a finite set, Infinite set, Equivalent set, Equal set, Universal set, Power set etc.
Now let’s have a look on relation of two sets. A set ‘P’ is a subset of set ‘Q’ if all the elements of set P are present in set Q.
In the year 1880, John Venn introduced a diagram to represent all possible collection of different sets. A Venn diagram consists of multiple overlapping closed curves, usually circles, each representing a set. Venn diagram can be used to represent different operation of sets, some of which are as follows:
 Union of set (\(A \cup B\)
): Union of two set A and B represent all the elements of either A or B.  Intersection of Set (\(A \cap B\)
): Intersection of two set A and B is a set that belongs to both A and B.  Complement of set (\({A}'\)
)): Let U be universal set. Complement of set A means all those elements of U which are not in A.
Learn more on Sets through solved RD Sharma Solutions that is provided in this section.
Chapter 1 Sets 

Sets Exercise 1.2  
Sets Exercise 1.7 