Answer
The number of elements in set A and set C = 9.
Work Step by Step
From the given Venn diagram,
the regions IV, V belongs to set A and set C.
It's given from the Venn diagram that:
The number of elements belongs to region IV = 2
The number of elements belongs to region V = 7
Therefore the number of elements in set A and set C = 2 + 7 = 9.