AQA D1 2011 June — Question 1

Exam BoardAQA
ModuleD1 (Decision Mathematics 1)
Year2011
SessionJune
TopicPermutations & Arrangements
TypeAssignment/allocation matching problems

1 Six people, \(A , B , C , D , E\) and \(F\), are to be allocated to six tasks, 1, 2, 3, 4, 5 and 6. The following adjacency matrix shows the tasks that each of the people is able to undertake.
123456
\(\boldsymbol { A }\)101000
\(\boldsymbol { B }\)110001
C010100
\(\boldsymbol { D }\)010010
E001010
F000010
  1. Represent this information in a bipartite graph.
  2. Initially, \(A\) is assigned to task 3, \(B\) to task 2, \(C\) to task 4 and \(D\) to task 5 . Use an algorithm from this initial matching to find a maximum matching, listing your alternating paths.