The (baseball) World Series consists of seven games, and the first team to win four games wins the title. The first two games are played at home; the next three away, and the last two at home again -- though of course not all games might be played. (As happened this year when the Marlins beat the Yankees 4-2... GRRR!!)
The probabilities involved were mentioned in World Series.
Assuming the teams have the same chance of winning each game, what is the most equitable way to plan the games, so as to minimize the expected difference between home and away games? And, in that case, what are the expected numbers of home games, of away games, and of total games?
(In reply to More importantly...
So far, the World is defined as "mostly USA, a little bit of Canada"... but there are talks about a *real* World Championship, including Japan, Cuba, Venezuela, and many other countries where baseball is played.