Introduction to Discrete Mathematical Models
SAS Hall 2102, Tue&Thu 10h15-11h30
sum(i*(5/6)^(i-1)*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 instant-runoff 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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