Exam 8: Probability
Exam 1: Functions and Applications159 Questions
Exam 2: Nonlinear Functions and Models92 Questions
Exam 3: The Mathematics of Finance137 Questions
Exam 4: Systems of Linear Equations and Matrices111 Questions
Exam 5: Matrix Algebra and Applications174 Questions
Exam 6: Linear Programming161 Questions
Exam 7: Sets and Counting154 Questions
Exam 8: Probability257 Questions
Exam 9: Random Variables and Statistics178 Questions
Exam 10: Introduction to the Derivative139 Questions
Exam 11: Techniques of Differentiation104 Questions
Exam 12: Applications of the Derivative88 Questions
Exam 13: The Integral66 Questions
Exam 14: Further Integration Techniques and Applications of the Integral118 Questions
Exam 15: Functions of Several Variables137 Questions
Exam 16: Trigonometric Models67 Questions
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The table shows the results of a survey of 99 authors by a publishing company. Compute the conditional probability: An unsuccessful author is established. New Authors Established Authors Total Successful 5 25 30 Unsuccessful 15 54 69 Total 20 79 99
(Multiple Choice)
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Two dice (one red and one green) are rolled, and the numbers that face up are observed. Test the pair of events for independence.
A: Neither die is 3; B: Exactly one die is 4.
A and B are __________ (dependent or independent).
(Short Answer)
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Use Bayes' Theorem to calculate when , , . Please round the answer to three decimal places.
__________
(Short Answer)
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Complete the probability distribution table and then calculate the stated probabilities. , Outcome a b Probability 0.1 0.35 0.1 0.05 __________ __________ __________ __________ __________
(Short Answer)
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Write down the transition matrix associated with the given state transition diagram.
,
(Multiple Choice)
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Let B be the event that you will buy a new car, let A be the event that the car will be an American made car, and let P be the event that you will make payments instead of paying in cash. Express the following in symbols.
"You will buy a used car or you will buy an American made car and make payments."
(Multiple Choice)
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A pair of dice is cast, and the number that appears uppermost on each die is observed.
Find the probability of the event that the sum of the numbers is 8.
(Multiple Choice)
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According to a New York Times/CBS poll released in March, 2005, 77% agreed that it should be the government's responsibility to provide a decent standard of living for the elderly, and 42% agreed that it would be a good idea to invest part of their Social Security taxes on their own. If agreement with one of these propositions is independent of agreement with the other, what is the probability that a person agreed with both propositions (Round your answer to two decimal places.)
The probability is __________.
(Short Answer)
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Compute the following quantities.
, , , and
__________
__________
__________
__________
(Essay)
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In a hand of poker, a player is dealt 5 cards at random from a deck of 52. Below is a list of poker hands ranked in order from the highest to the lowest, along with a description and example of each hand. Use the table to answer the problem.
What is the probability of being dealt four of a kind Round your answer to five decimal places.
(Multiple Choice)
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Lance the Wizard has been informed that tomorrow there will be a 40% chance of encountering the evil Myrmidons and a 15% chance of meeting up with the dreadful Balrog. Moreover, Hugo the Elf has predicted that there is a 10% chance of encountering both tomorrow. What is the probability that Lance will be lucky tomorrow and encounter neither the Myrmidons nor the Balrog
Enter your answer in decimal form, not as a fraction.
The probability is __________.
(Short Answer)
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A bag contains 4 red marbles, 3 green ones, 3 white ones, and 1 purple one. Michelle reaches into the bag and grabs 6 of the marbles. Find the probability that she does not have all green ones. Express your answer as a fraction in lowest terms.
(Essay)
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The following table shows the results of a survey of 360 authors by a (fictitious) publishing company: New Authors Established Authors Total Successful 40 20 60 Unsuccessful 140 160 300 Total 180 180 360 An unsuccessful author is chosen at random.
Compute the estimated probability of the event that the unsuccessful author is established.
(Multiple Choice)
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A local TV station employs Desmorelda, "Mistress of the Zodiac", as its weather forecaster. Now, when it rains, Sagittarius is in the shadow of Jupiter one-fourth of the time, and it rains on 4 out of every 50 days. Sagittarius falls in Jupiter's shadow on only one in every six rainless days. The powers that be at the station notice a disturbing pattern to Desmorelda's weather predictions. It seems that she always predicts that it will rain when Sagittarius is in the shadow of Jupiter. What percentage of the time is she correct Round your answer to the nearest 1%.
The percentage is __________%.
(Short Answer)
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Write down the transition matrix associated with the state transition diagram.

(Essay)
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The following table shows the results of a survey of 350 authors by a (fictitious) publishing company: New Authors Established Authors Total Successful 40 10 50 Unsuccessful 150 150 300 Total 190 160 350
An author is chosen at random.
Compute the estimated probability of the event that the author is unsuccessful and new.
(Essay)
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If a coin is tossed 13 times, find the probability of the sequence H, T, T, H, H, H, T, H, H, T, T, H, H.
(Multiple Choice)
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The following table shows the results of a survey of authors by a (fictitious) publishing company: New Authors Established Authors Total Successful 5 25 30 Unsuccessful 15 55 70 Total 20 80 100 What percentage of new authors are successful
(Multiple Choice)
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Tommy the Dunker's performance on the basketball court is influenced by his state of mind: If he scores, he is twice as likely to score on the next shot as he is to miss, whereas if he misses a shot, he is four times as likely to miss the next shot as he is to score. In the long term, what percentage of shots are successful
(Essay)
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A quarter, penny, and dime are tossed. If we are interested in the number of heads that appear on a single toss, what is the sample space
(Multiple Choice)
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