AQA D1 2006 June — Question 1

Exam BoardAQA
ModuleD1 (Decision Mathematics 1)
Year2006
SessionJune
TopicMatchings and Allocation

1 Five people, \(A , B , C , D\) and \(E\), are to be matched to five tasks, 1, 2, 3, 4 and 5. The table shows which tasks each person can do.
PersonTasks
\(A\)\(1,3,5\)
\(B\)2,4
\(C\)2
\(D\)4,5
\(E\)3,5
  1. Show this information on a bipartite graph.
  2. Initially \(A\) is matched to task 3, \(B\) to task 4, \(C\) to task 2 and \(E\) to task 5 . Use an alternating path from this initial matching to find a complete matching.