Back to 11.2 Fairness in Voting Methods

11.2 Exercise 3

Avg difficulty 2.5

Those seven college students are hungry again! Their preferences haven’t changed, as shown below. Let’s calculate if the results change when we use different voting methods.

VOTERS A B C D E F G
(M) McDonald’s 1 1 1 1 5 5 5
(B) Burger King 2 2 2 2 2 2 2
(T) Taco Bell 4 4 3 4 3 3 1
(O) Pollo Tropical 3 5 4 3 4 1 3
(I) Pizza Hut 5 3 5 5 1 4 4

  1. Which restaurant is the winner using the pairwise comparison voting method?
  2. Which restaurant is the winner using the Borda count voting method?
  3. Does the majority criterion apply? If so, for which voting method(s), if any, did the majority criterion fail?

OpenStax Contemporary Mathematics, 11.2 Fairness in Voting Methods, exercise 3

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Adapted from Contemporary Mathematics © 2023 Rice University. Licensed under CC BY 4.0. Source: Contemporary Mathematics. Imported at revision fa7c1a1.