Chapter 2 - Set Theory - 2.3 Venn Diagrams and Set Operations - Exercise Set 2.3 - Page 81: 70

A ∪ B = {1,2,3,4,5,6,7}

A∪B The set A ∪ B represents all the elements of set A and elements of set B that are not present in 'A'. From the given Venn Diagram the regions of A∪B are I, II and III. The elements of A ∪ B are 1,2,3,4,5,6,7. Therefore set A ∪ B = {1,2,3,4,5,6,7}