Answer
The number of elements in set A or set B = 24.
Work Step by Step
From the given Venn diagram,
the regions I, II, III, IV. V. VI belongs to set A or set B.
It's given from the Venn diagram that,
The number of elements belongs to region I = 5
The number of elements belongs to region II = 1
The number of elements belongs to region III = 6
The number of elements belongs to region IV = 2
The number of elements belongs to region V = 7
The number of elements belongs to region VI = 3
Therefore the number of elements in set A or set B = 5 + 1 + 6 + 2 + 7 + 3 = 24.
