Bertrand's ballot theorem

'Bad' path (blue) and its reflected path (red)

In combinatorics, Bertrand's ballot problem is the question: "In an election where candidate A receives p votes and candidate B receives q votes with p > q, what is the probability that A will be strictly ahead of B throughout the count?" The answer is

单词	Ballot theory
释义	Ballot theory 英语百科 Bertrand's ballot theorem In combinatorics, Bertrand's ballot problem is the question: "In an election where candidate A receives p votes and candidate B receives q votes with p > q, what is the probability that A will be strictly ahead of B throughout the count?" The answer is
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Ballot theory

Bertrand's ballot theorem