Edexcel D1 2018 June — Question 5

Exam BoardEdexcel
ModuleD1 (Decision Mathematics 1)
Year2018
SessionJune
TopicCombinations & Selection

5. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{6b51f3a0-0945-4254-8c63-20e1371e9e3a-06_648_567_273_750} \captionsetup{labelformat=empty} \caption{Figure 3}
\end{figure} Figure 3 shows the possible allocations of five workers, Cole (C), Dorothy (D), Harold (H), Richard (R) and Stephen (S), to five tasks, 1, 2, 3, 4 and 5. In an initial matching, each of three workers is allocated to a different task. For this initial matching, there are three possible alternating paths that start at C . One alternating path is $$C - 3 = S - 4 = D - 5$$ A second alternating path is $$\mathrm { C } - 1 = \mathrm { H } - 2$$
  1. Use this information to deduce the initial matching.
  2. Find the third alternating path that starts at C .
  3. List the improved matching generated by using the alternating path \(\mathrm { C } - 3 = \mathrm { S } - 4 = \mathrm { D } - 5\)
  4. Starting from the improved matching found in (c), use the maximum matching algorithm to obtain a complete matching. You must list the alternating path you use and the final matching.
    (3)