Set and It's Elements

 A set is a group or collection of objects or numbers, considered as an entity  up to itself. Set can be defined  as follows:

      •  “A set is any collection of well-defined and well-distinguished objects. ”


      •  “A set is any collection of objects such that given an object,it is possible to determine whether that object belongs to the given collection or not.”


Sets are usually  symbolized by upper case letter,such as A,B,C,X,Y,Z etc. Each object or number in a set is called a member or element of the set. Elements of sets are usually symbolized by lower case letter, such as a,b,c,p,q,r,x,y,z etc.


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