Question

what is difference between subset and proper subset

Answer 1

Consider two sets A and B, if every elements present in A are also present in B, then the set is a Subset. But, In two sets A and B, B is a proper subset of A, if all the elements of B are in A, but A contains at least one element that is not in B. For example, if A ={a,b,c} then B={a,c} is a proper subset of A.

Answer 2

If when all the elements of set A is in set B then it is subset
and in case if all element of set B is in set A also then it is proper subset

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