The following diagram illustrates a 16-team tournament bracket, in which the 16 participating teams are arranged on the left under Round 1 and the winners of each round are added as the tournament progresses. The top team in each game is considered the “home” team, so the topto- bottom order matters. To seed a tournament means to select which teams to play each other in the first round according to their preliminary ranking. For instance, in professional tennis and NCAA basketball the seeding is set up in the following order based on the preliminary rankings: 1 versus 16, 8 versus 9, 5 versus 12, 4 versus 13, 6 versus 11, 3 versus 14, 7 versus 10, and 2 versus 15.48 Exercises 37–40 are based on various types of elimination tournaments. (Leave each answer as a formula.) In a randomly chosen seeding of an 8-team tournament, what is the probability that each team plays a team with adjacent ranking?

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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The following diagram illustrates a
16-team tournament bracket, in which the 16 participating
teams are arranged on the left under Round 1 and the winners
of each round are added as the tournament progresses. The top team in each game is considered the “home” team, so the topto-
bottom order matters.

To seed a tournament means to select which teams to play each
other in the first round according to their preliminary ranking.
For instance, in professional tennis and NCAA basketball the
seeding is set up in the following order based on the preliminary
rankings: 1 versus 16, 8 versus 9, 5 versus 12, 4 versus
13, 6 versus 11, 3 versus 14, 7 versus 10, and 2 versus 15.48
Exercises 37–40 are based on various types of elimination
tournaments. (Leave each answer as a formula.)

In a randomly chosen seeding of an 8-team tournament,
what is the probability that each team plays a team with
adjacent ranking?

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