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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Fifty percent of the workers at a factory work a second job, 25% have a spouse who also works, 5% work a second job and have a spouse who also works. Draw a Venn diagram showing the relationships. Let W = works a second job and S = spouse also works.
Answer these questions using probability rules. Do NOT use the contingency table. Three thousand fifty-nine cases of AIDS had been reported in Santa Clara County, CA, through a certain date. Those cases will be our population. Of those cases, obtained the disease through heterosexual contact and are female. Out of the females with the disease, got the disease from heterosexual contact.
a. Find P(Person is female).
b. Find P(Person obtained the disease through heterosexual contact).
c. Find P(Person is female GIVEN person got the disease from heterosexual contact)
d. Construct a Venn diagram representing this situation. Make one group females and the other group heterosexual contact. Fill in all values as probabilities.
An experiment consists of first rolling a die and then tossing a coin.
a. List the sample space.
b. Let A be the event that either a three or a four is rolled first, followed by landing a head on the coin toss. Find .
c. Let B be the event that the first and second tosses land on heads. Are the events A and B mutually exclusive? Explain your answer in one to three complete sentences, including numerical justification.
Q and R are independent events. and . Find P(R).
Use the information in the Table to answer the next eight exercises. The table shows the political party affiliation of each of members of the US Senate In June . and when they are up freelection.

Suppose that a member of the US Senate is randomly selected. what is the probability that the senator Is up for reelection in November , knowing that this senator is a Republican?
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