Mathematics All Around (6th Edition)
6th Edition
ISBN: 9780134434681
Author: Tom Pirnot
Publisher: PEARSON
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Chapter 11.2, Problem 3E
Determining the legal drinking age. A state commission is voting on changing the legal drinking age. The options are A, lower the age to 18; B, lower the age to 19; C, lower the age to 20; and D, keep the age at 21. Use the preference table to determine the winner using the Borda count method. Show that Condorcet’s criterion is not satisfied.
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Let G
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(V,E) be a 3-connected graph. We prove that for every x, y, z Є V, there is a
cycle in G on which x, y, and z all lie.
(a) First prove that there are two internally disjoint xy-paths Po and P₁.
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x, y, and z all lie. So assume that z is not on Po and not on P₁. Now prove that
there are three paths Qo, Q1, and Q2 such that:
⚫each Qi starts at z;
• each Qi ends at a vertex w; that is on Po or on P₁, where wo, w₁, and w₂ are
distinct;
the paths Qo, Q1, Q2 are disjoint from each other (except at the start vertex
2) and are disjoint from the paths Po and P₁ (except at the end vertices wo,
W1, and w₂).
(c) Use paths Po, P₁, Qo, Q1, and Q2 to prove that there is a cycle on which x, y, and
z all lie. (To do this, notice that two of the w; must be on the same Pj.)
Chapter 11 Solutions
Mathematics All Around (6th Edition)
Ch. 11.1 - Four candidates running for a vacant seat on the...Ch. 11.1 - Five candidates running for mayor receive votes as...Ch. 11.1 - The university administration has asked a group of...Ch. 11.1 - The university administration has asked a group of...Ch. 11.1 - The university administration has asked a group of...Ch. 11.1 - The university administration has asked a group of...Ch. 11.1 - The drama society members are voting for the type...Ch. 11.1 - The drama society members are voting for the type...Ch. 11.1 - The drama society members are voting for the type...Ch. 11.1 - The drama society members are voting for the type...
Ch. 11.1 - Before a conference on Trends in the next Decade,...Ch. 11.1 - Before a conference on Trends in the next Decade,...Ch. 11.1 - Prob. 13ECh. 11.1 - Prob. 14ECh. 11.1 - A small employee-owned Internet company is voting...Ch. 11.1 - Prob. 16ECh. 11.1 - Prob. 17ECh. 11.1 - A small employee-owned Internet company is voting...Ch. 11.1 - Prob. 19ECh. 11.1 - Prob. 20ECh. 11.1 - Prob. 21ECh. 11.1 - Prob. 22ECh. 11.1 - In Exercises 23-26, refer to the preference table...Ch. 11.1 - Prob. 24ECh. 11.1 - In Exercises 23-26, refer to the preference table...Ch. 11.1 - Prob. 26ECh. 11.1 - In Exercises 27-30, refer to the preference table...Ch. 11.1 - In Exercises 27-30, refer to the preference table...Ch. 11.1 - In Exercises 27-30, refer to the preference table...Ch. 11.1 - Prob. 30ECh. 11.1 - Prob. 31ECh. 11.1 - Prob. 32ECh. 11.1 - Prob. 33ECh. 11.1 - Prob. 34ECh. 11.1 - Prob. 35ECh. 11.1 - Prob. 36ECh. 11.1 - Prob. 37ECh. 11.1 - Prob. 38ECh. 11.1 - Prob. 39ECh. 11.1 - Prob. 40ECh. 11.1 - Prob. 41ECh. 11.1 - Prob. 42ECh. 11.1 - Prob. 43ECh. 11.1 - Math in Your Life: Between the Numbers Instant...Ch. 11.1 - In approval voting, a person can vote for more...Ch. 11.1 - Prob. 46ECh. 11.1 - Prob. 47ECh. 11.1 - Prob. 48ECh. 11.1 - Prob. 49ECh. 11.1 - Prob. 50ECh. 11.1 - Prob. 51ECh. 11.1 - Prob. 52ECh. 11.2 - Some of these exercises have no fixed solution...Ch. 11.2 - Some of these exercises have no fixed solution...Ch. 11.2 - Determining the legal drinking age. A state...Ch. 11.2 - Voting for the president of a club. A chapter of...Ch. 11.2 - Choosing a location for a research facility. Teach...Ch. 11.2 - Locating a new factory. The Land Mover Tractor...Ch. 11.2 - Reducing a budget. Due to a decrease in state...Ch. 11.2 - Voting on an award for best restaurant. A group of...Ch. 11.2 - Use the following preference table for Exercises 9...Ch. 11.2 - Use the following preference table for Exercises 9...Ch. 11.2 - Complete the preference table so that the Borda...Ch. 11.2 - Complete the preference table so that A is the...Ch. 11.2 - Prob. 13ECh. 11.2 - Make a preference table similar to the one given...Ch. 11.2 - Complete the preference table so that the...Ch. 11.2 - Does the plurality method satisfy the majority...Ch. 11.2 - Does the plurality-with-elimination method satisfy...Ch. 11.2 - Prob. 18ECh. 11.2 - Presidential election. One of the several...Ch. 11.2 - Prob. 20ECh. 11.2 - Prob. 21ECh. 11.2 - A run off election. Repeat Exercise 21 using this...Ch. 11.2 - Prob. 23ECh. 11.2 - Prob. 24ECh. 11.2 - Prob. 25ECh. 11.2 - Prob. 26ECh. 11.2 - Prob. 27ECh. 11.2 - Voters are choosing among five options. Make a...Ch. 11.2 - Make a preference table, similar to the one given...Ch. 11.2 - Prob. 30ECh. 11.2 - Prob. 31ECh. 11.2 - Prob. 32ECh. 11.2 - Prob. 33ECh. 11.2 - Prob. 34ECh. 11.2 - One of the voting methods we have been discussing...Ch. 11.3 - Prob. 1ECh. 11.3 - Prob. 2ECh. 11.3 - In Exercises 1-12, the weight represent voters A,...Ch. 11.3 - Prob. 4ECh. 11.3 - Prob. 5ECh. 11.3 - Prob. 6ECh. 11.3 - In Exercises 1-12, the weight represent voters A,...Ch. 11.3 - In Exercises 1-12, the weight represent voters A,...Ch. 11.3 - In Exercises 1-12, the weight represent voters A,...Ch. 11.3 - Prob. 10ECh. 11.3 - Prob. 11ECh. 11.3 - Prob. 12ECh. 11.3 - In Exercises 13-16, write out all winning...Ch. 11.3 - Prob. 14ECh. 11.3 - In Exercises 13-16, write out all winning...Ch. 11.3 - Prob. 16ECh. 11.3 - Prob. 17ECh. 11.3 - Prob. 18ECh. 11.3 - Prob. 19ECh. 11.3 - Prob. 20ECh. 11.3 - Prob. 21ECh. 11.3 - Prob. 22ECh. 11.3 - Prob. 23ECh. 11.3 - Prob. 24ECh. 11.3 - Prob. 25ECh. 11.3 - Prob. 26ECh. 11.3 - Prob. 27ECh. 11.3 - Prob. 28ECh. 11.3 - Prob. 29ECh. 11.3 - Prob. 30ECh. 11.3 - Prob. 31ECh. 11.3 - Prob. 32ECh. 11.3 - In Exercises 29-34, determine the Banzhaf power...Ch. 11.3 - Prob. 34ECh. 11.3 - The system [3:1,1,1,1,1] is an example of a one...Ch. 11.3 - Prob. 36ECh. 11.3 - Consider the system [14:15,2,3,3,5] in which A is...Ch. 11.3 - Prob. 38ECh. 11.3 - Calculating power in the electoral college. After...Ch. 11.3 - Prob. 40ECh. 11.3 - Prob. 41ECh. 11.3 - Prob. 42ECh. 11.3 - Prob. 43ECh. 11.3 - In Example 5, we analyzed the voting power of the...Ch. 11.3 - In Example 5, we analyzed the voting power of the...Ch. 11.3 - Prob. 46ECh. 11.3 - Prob. 47ECh. 11.3 - Prob. 48ECh. 11.3 - Prob. 49ECh. 11.3 - Prob. 50ECh. 11.3 - A dummy in a weighted voting system is a voter...Ch. 11.3 - Prob. 52ECh. 11.3 - Prob. 53ECh. 11.3 - Prob. 54ECh. 11.3 - In Exercises 55 and 56, devise a voting system...Ch. 11.3 - Prob. 56ECh. 11.4 - In Exercises 1 4, use tree diagrams to find all...Ch. 11.4 - Prob. 2ECh. 11.4 - In Exercises 1 4, use tree diagrams to find all...Ch. 11.4 - Prob. 4ECh. 11.4 - Prob. 5ECh. 11.4 - Prob. 6ECh. 11.4 - Prob. 7ECh. 11.4 - Prob. 8ECh. 11.4 - Prob. 9ECh. 11.4 - Prob. 10ECh. 11.4 - Prob. 11ECh. 11.4 - Prob. 12ECh. 11.4 - In Exercises 1116, determine the Shapley-Shubik...Ch. 11.4 - Prob. 14ECh. 11.4 - Prob. 15ECh. 11.4 - Prob. 16ECh. 11.4 - The system [3:1,1,1,1,1] is an example of a one...Ch. 11.4 - Measuring power on a jury. We can consider a...Ch. 11.4 - Prob. 19ECh. 11.4 - Prob. 20ECh. 11.4 - Prob. 21ECh. 11.4 - Measuring power on a theater guild. The Theater...Ch. 11.4 - Measuring power on a state committee. The college...Ch. 11.4 - Prob. 24ECh. 11.4 - Prob. 25ECh. 11.4 - A new social media company, Chirp, has an...Ch. 11.4 - Prob. 27ECh. 11.4 - Measuring power among states. Repeat Exercise 27...Ch. 11.4 - Explain the difference between the Banzhaf index...Ch. 11.4 - Prob. 30ECh. 11.4 - Prob. 31ECh. 11.4 - Prob. 32ECh. 11.4 - Prob. 33ECh. 11.4 - Prob. 34ECh. 11.CR - Prob. 1CRCh. 11.CR - Prob. 2CRCh. 11.CR - Prob. 3CRCh. 11.CR - Prob. 4CRCh. 11.CR - Prob. 5CRCh. 11.CR - Prob. 6CRCh. 11.CR - Prob. 7CRCh. 11.CR - Prob. 8CRCh. 11.CR - Prob. 9CRCh. 11.CR - Prob. 10CRCh. 11.CR - Prob. 11CRCh. 11.CR - Prob. 12CRCh. 11.CR - Prob. 13CRCh. 11.CR - Prob. 14CRCh. 11.CR - Prob. 15CRCh. 11.CR - Prob. 16CRCh. 11.CR - Prob. 17CRCh. 11.CR - Prob. 18CRCh. 11.CT - Prob. 1CTCh. 11.CT - Prob. 2CTCh. 11.CT - Prob. 3CTCh. 11.CT - Prob. 4CTCh. 11.CT - Prob. 5CTCh. 11.CT - Prob. 6CTCh. 11.CT - Prob. 7CTCh. 11.CT - Prob. 8CTCh. 11.CT - Prob. 9CTCh. 11.CT - Determine the Banzhaf power index for each voter...Ch. 11.CT - Prob. 11CTCh. 11.CT - Prob. 12CTCh. 11.CT - Prob. 13CTCh. 11.CT - Prob. 14CTCh. 11.CT - Prob. 15CTCh. 11.CT - Prob. 16CT
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