Answer
The number of elements belongs to set A or set C but not set B = 5 + 2 + 10 =17.
Work Step by Step
From the given Venn diagram,
the regions I, IV, VII represents to set A or set C but not 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 IV = 2
The number of elements belongs to region VII = 10
Therefore the number of elements belongs to set A or set C but not set B = 5 + 2 + 10 =17.
