(Choose 1 answer)
Let G be a simple graph. The complementary graph of G is the graph G' having the same set of vertices, and there is an edge connecting u and v in G' if and only if there is no edge connecting u and v in G.
If G has 10 vertices and 20 edges, how many edges does G' have?
A. 25
B. 20
C. 70
D. 45
E. None of the other choices is correct
Exit 2
