Answer
n(A∪B) = 6
Work Step by Step
n(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 #,$,△, two, six, four.
There are six elements n(A∪B) = 6.
