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The World Series in baseball continues until either the American League team or

ID: 2955805 • Letter: T

Question

The World Series in baseball continues until either the
American League team or the National League team wins four games.
How many different orders are possible if the series goes at least six
games? (Don’t try to list all possible orders.)

The answer in the back of the book is 20. I just need to know how to get to 20. Please note that this question is asking for all the possible orders of games. There should be a formula that is implemented, I just cant figure out which one to apply.

Thank you for your time

Explanation / Answer

The team needs 3 wins in the first 6 games and 1 win in the last game: C(6,3)*C(1,1) = 20

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