Chapter 4.2, Problem 63E

World Series. The World Series in baseball is won by the first team to win four games (ignoring the 1903 and 1919–1921 World Series, when it was a best of nine). Thus it takes at least four games and no more than seven games to establish a winner. From the document World Series History on the Baseball Almanac website, as of November 2013, the lengths of the World Series are as given in the following table.

Games required    Frequency

4	21
5	24
6	24
7	36

For one of these series selected at random, let

A = event that the World Series was decided in four games.

B = event that the World Series was decided in less than six games.

C = event that the World Series was decided in seven games.

Describe the following events in words, and determine the number of outcomes (World Series) that constitute each event.

a. (not A)

b. (A & B)

c. (A or C)

d. (A & C)