Question 1
A graph has twelve vertices—two vertices of degree 4, four vertices of degree 3, and six vertices of degree 2. The number of edges in the graph is
◦ 12.
◦ 16.
◦ 9.
◦ 14.
◦ none of these
Question 2
A graph has six vertices—two vertices of degree 4, two vertices of degree 3, and two vertices of degree 2. The number of edges in the graph is
◦ 9.
◦ 5.
◦ 6.
◦ 8.
◦ none of these