MA351 Introduction to Discrete Mathematical Models Fall 2016 SAS Hall 2102, Tue&Thu 10h1511h30 
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Current Announcementssum(i*(5/6)^(i1)*1/6,i=1..infinity) = 6. 7 6 5 3 first A B C D second B A B C third C C A B last D D D A D has the least first place votes and is eliminated. The instantrunoff is 7 6 5 3 first A B C C second B A B B third C C A AB is eliminated next, and A with 13 first place votes wins. Now suppose that the 3 voters find out that A will win (``everyone likes a winner'') and change their vote for A from LAST to FIRST place: 7 6 5 3 first A B C A second B A B D third C C A C laste D D D BD is eliminated first with 0 first place votes, then C, so we have 7 6 5 3 first A B B A second B A A Band B wins! 
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