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Basic probability - set theory.
The following table, compiled in 2004, gives the percent of music downloaded from the United States and other countries by U.S. users.
Country
U.S.
Germany
Canada
Italy
U.K.
France
Japan
Other
Percent
45.1
16.1
6.5
5.6
4.1
3.7
2.4
16.5
(a) Verify that the table does give a probability distribution for the experiment.
The sum of the percents is %, so this does give the probability distribution.
(b) What is the probability that a U.S. user who downloads music, selected at random, obtained it from either the United States or Canada?
(c) What is the probability that a U.S. user who downloads music, selected at random, does not obtain it from Italy, the United Kingdom (U.K.), or France?
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