Easy -1.8 This is a direct application of the handshaking lemma (sum of degrees = 2 × edges), requiring only recall of a single formula with no problem-solving. Even simpler than typical index law questions since it's one-step arithmetic: 2 × 6 = 12.
1 A graph has 5 vertices and 6 edges.\\
Find the sum of the degrees of the vertices.
Circle your answer.
10111215
\hfill \mbox{\textit{AQA Further AS Paper 2 Discrete Q1 [1]}}