Chapter 3: Q.103 (page 227)
What is the probability that a randomly selected senator is a Democrat and up for reelection in November 2016?
Short Answer
The probability is
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Chapter 3: Q.103 (page 227)
What is the probability that a randomly selected senator is a Democrat and up for reelection in November 2016?
The probability is
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In a standard deck, there are 52 cards. 12 cards are face cards (event F) and 40 cards are not face cards (event N). Draw two cards, one at a time, with replacement. All possible outcomes are shown in the tree diagram as frequencies.
Using the tree diagram, calculate P(FF).

Use the The graph shown is based on more thaninterviews done by Gallup that took place from January through December . The sample consists of employed Americans years of age or older. The Emotional Health Index Scores are the sample space. We randomly sample one Emotional Health Index Score.
Find the probability that an Emotional Health Index Score is

Three professors at George Washington University did an experiment to determine if economists are more selfish than other people. They dropped stamped, addressed envelopes with cash in different classrooms on the George Washington campus. were returned overall. From the economics classes of the envelopes were returned. From the business, psychology, and history classes were returned.
Let:R = money returned;E = economics classes; O = other classes
a. Write a probability statement for the overall percent of money returned.
b. Write a probability statement for the percent of money returned out of the economics classes.
c. Write a probability statement for the percent of money returned out of the other classes.
d. Is money being returned independent of the class? Justify your answer numerically and explain it.
e. Based upon this study, do you think that economists are more selfish than other people? Explain why or why not. Include numbers to justify your answer.
Use the following information to answer the next ten exercises. On a baseball team, there are infielders and outfielders.
Some players are great hitters, and some players are not great hitters.
Let I = the event that a player in an infielder.
Let O = the event that a player is an outfielder.
Let H = the event that a player is a great hitter.
Let N = the event that a player is not a great hitter.
Write the symbols for the probability that a player is not an outfielder.
Write the symbols for the probability that of all the great hitters, a player is an outfielder.
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