Edexcel D1 2008 January — Question 1

Exam BoardEdexcel
ModuleD1 (Decision Mathematics 1)
Year2008
SessionJanuary
TopicCombinations & Selection

  1. (a) Define the terms
    1. alternating path,
    2. matching.
    \begin{figure}[h]
    \includegraphics[alt={},max width=\textwidth]{7396d930-0143-4876-b019-a4d73e09b172-2_568_621_689_344} \captionsetup{labelformat=empty} \caption{Figure 1}
    \end{figure} \begin{figure}[h]
    \includegraphics[alt={},max width=\textwidth]{7396d930-0143-4876-b019-a4d73e09b172-2_554_540_701_1171} \captionsetup{labelformat=empty} \caption{Figure 2}
    \end{figure} At a school fair, five teachers, \(A , B , C , D\) and \(E\), are to supervise five stalls, \(1,2,3,4\) and 5 .
    A bipartite graph showing their possible allocations is given in Figure 1. An initial matching is given in Figure 2.
    (b) Use the maximum matching algorithm twice to obtain a complete matching. List clearly the alternating paths you use.