United States Senate as of January 2010 Use the information in the table to answer the
Chapter 8, Problem 56(choose chapter or problem)
United States Senate as of January 2010 Use the information in the table to answer the questions. Democrats Republicans Independents Terms expire in January 2011 16 18 0 Terms expire in January 2013 21 10 2 Terms expire in January 2015 20 13 0 Source: www.senate.gov (a) Suppose that a member of the U.S. Senate was randomly selected. Given that the term of that senator will expire in January 2013, what is the probability that this senator is a Democrat? (b) Suppose that three members of the U.S. Senate were randomly selected. Given that the term of each of these senators will expire in January 2013 or in January 2015, what is the probability that all three of these senators were Republicans? (c) Suppose that two members of the U.S. Senate were randomly selected. Given that one of these senators is a Democrat and the other is a Republican, what is the probability that the term of each of these senators will expire in January 2011? (d) Suppose that a committee of five U.S. senators was randomly selected. Given that the term of each of these senators will expire before 2014, what is the probability that at least three of the senators on this committee were Democrats?
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