Chapter 2 - Set Theory - 2.3 Venn Diagrams and Set Operations - Exercise Set 2.3 - Page 81: 21

A' = {2,4,6}

U = {1,2,3,4,5,6,7} A = { 1,3,5,7} B = {1,2,3} C = {2,3,4,5,6} The set A' contains all the elements that are not in set A. Since A contains 1,3,5,7 so these elements will not be there in set A. Therefore the elements of A' are 2,4,6. A' = {2,4,6}