Ans: In set operations math, consider a universal set U, and A is a subset of U, then the complement of a set A will contain all the elements of set U leaving the elements of set A. The complement of set A is denoted as A’. Let us take an example if Set U, i.e. an universal set which has the following elements U= {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and A is a subset of U, which has the following elements A= {2, 3, 4, 5, 6}, then complement of set A, i.e. A’ ={1, 7, 8, 9, 10}.