Edexcel D1 2014 June — Question 2

Exam BoardEdexcel
ModuleD1 (Decision Mathematics 1)
Year2014
SessionJune
TopicCombinations & Selection

2. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{23cc3c59-35d8-4120-9965-952c0ced5b3d-3_437_399_251_511} \captionsetup{labelformat=empty} \caption{Figure 1}
\end{figure} \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{23cc3c59-35d8-4120-9965-952c0ced5b3d-3_437_401_251_1151} \captionsetup{labelformat=empty} \caption{Figure 2}
\end{figure} Figure 1 shows the possible allocations of five employees, Ali (A), Campbell (C), Hugo (H), Janelle (J) and Polly (P), to five tasks 1, 2, 3, 4 and 5.
  1. Explain why it is not possible to find a complete matching. It is decided that one of the employees should be trained so that a complete matching becomes possible. There are only enough funds for one employee to be trained. Two employees volunteer to undergo training. Janelle can be trained to do task 1 or Hugo can be trained to do task 5.
  2. Decide which employee, Janelle or Hugo, should undergo training. Give a reason for your answer. You may now assume that the employee you identified in (b) has successfully undergone training. Figure 2 shows an initial matching.
  3. Starting from the given initial matching, use the maximum matching algorithm to find a complete matching. You should list the alternating path that you use, and state the complete matching.