Edexcel D1 2013 Specimen — Question 5

Exam BoardEdexcel
ModuleD1 (Decision Mathematics 1)
Year2013
SessionSpecimen
TopicCombinations & Selection

5. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{5fa867a2-0a3d-4f0b-9f9c-15584f2be5c0-06_730_597_269_315} \captionsetup{labelformat=empty} \caption{Figure 3}
\end{figure} \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{5fa867a2-0a3d-4f0b-9f9c-15584f2be5c0-06_722_583_274_1160} \captionsetup{labelformat=empty} \caption{Figure 4}
\end{figure} Figure 3 shows the possible allocations of six people, Amelia, Charlie, Ellie, Gemma, Jimmy and Saskia, to six tasks, 1, 2, 3, 4, 5 and 6.
Figure 4 shows an initial matching.
  1. Use the maximum matching algorithm once to find an improved matching. You must state the alternating path used and your improved matching.
  2. Explain why a complete matching is not possible. After training, Jimmy can be assigned to tasks 4 or 5 and Ellie to tasks 2, 3, 5 or 6.
  3. Starting with your current maximal matching, use the maximum matching algorithm to obtain a complete matching. You must state the alternating path used and your final matching.