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IKMC 2013 - Grades 11-12 - Paper 02 - Self-study Question 30

IKMC · IKMC 2013 - Grades 11-12 - Paper 02 - Self-study

Question 30

Five cars enter a roundabout at the same time. Each travels less than a full round, and exactly one car leaves at each exit. How many combinations of exits are possible? The source says “see picture”, but no roundabout drawing is printed on this Austria page; the intended five distinct approaches/exits are made explicit here.
  1. 24
  2. 44
  3. 60
  4. 81
  5. 120