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Question 1 Not answered Marked out of 3.00 ¥ Flag question Question 2 Not answered Marked out of 1.00 ¥ Flag question A survey of new Toyota Corolla owners has shown that during the first year of ownership, 15% of Corollas required repairs once, 8% required repairs twice, and 5% required repairs three or more times. Suppose you are interested in purchasing one. (a) What is the probability that your new car won't require any repairs during the first year? Answer: ‘ ‘ (b) What is the probability that your new car will need repairs no more than once during the first year? Answer: ‘ ‘ (c) What is the probability that at least one repair will be required during the first year? Answer: ‘ ‘ A correct answer is (.72, which can be typed in as follows: 0.72 A correct answer is (.87, which can be typed in as follows: 0.87 A correct answer is (.28, which can be typed in as follows: 0.28 Suppose a large group of adults were surveyed about a variety of topics. Which of the following sets of events are NOT disjoint? Attended post-secondary school vs. Did not attend post-secondary school Having at least one kid vs. Having no kids Owning a car vs. Not owning a car Being older than 35 vs. Not being younger than 35 Drinking more than 3 cups of coffee vs. Drinking 3 cups of coffee or less
Question 3 Not answered Marked out of 3.00 " Flag question Question 4 Not answered Marked out of 1.00 " Flag question Suppose that last month, WestJet flights arrived on time 72% of the time and you were on 3 of those flights. (Round your answers to 4 decimal places, if needed.) (a) Given that each flight is independent of one another, what is the probability that all of your flights arrived on time? Answer: ‘ ‘ (b) What is the probability that none of your flights arrived on time? Answer: ‘ ‘ (c) What is the probability that at least one of your flights arrived on time? Answer: ‘ ‘ A correct answer is 0.3732, which can be typed in as follows: 0.3732 A correct answer is 0.022, which can be typed in as follows: 0.022 A correct answer is 0.978, which can be typed in as follows: 0,978 Suppose you play a game where you throw a weighted 4-sided die and win money based on what it lands on. Of the following probability assignments, which one is NOT possible? 1 2 3 4 a) 0.25 0.25 1/3 1/6 b) 1/3 0 1/3 1/3 c) 0 0 1.05 0 d) 0.2 0.2 0.2 0.4 e) 0.1 0.1 0.4 0.4 Row a Row b Row ¢ Row d Row e A correct answer is: * Rowec
Question 5 Not answered Marked out of 2.00 ¥ Flag question Question 6 Not answered Marked out of 4.00 " Flag question A survey of 217 people in an introductory math course at the University of Alberta found that 177 people were under the age of 20, and 25 people were over the age of 30. (Round all answers to 3 decimal places, if needed.) (a) What is the probability that a randomly selected person is either above the age of 30 or under the age of 20? Answer: (b) What is the probability that a randomly selected person is between the ages of 20 and 30, inclusive? Answer: ’ A correct answer is 0.931, which can be typed in as follows: 0.931 A correct answer is 0.069, which can be typed in as follows: 0.069 One evening at a local restaurant, a manager decided to ask his patrons which meals they had cooked for themselves during the day, as opposed to eating out at a restaurant. The manager found that 30% cooked breakfast, 19% cooked lunch, and 7% cooked both meals. (Round your answers to 2 decimal places, if needed.) Hint: Drawing a Venn diagram may help. (a) What is the probability that a randomly selected patron cooked breakfast or lunch? [ (b) What is the probability that a randomly selected patron cooked breakfast but not lunch? (c) What is the probability that a randomly selected patron cooked lunch but not breakfast? (d) What is the probability that a randomly selected patron cooked none of their meals? [} A correct answer is (.42, which can be typed in as follows: 0.42 A correct answer is (.23, which can be typed in as follows: 0.23 A correct answer is (.12, which can be typed in as follows: 0.12 A correct answer is (.58, which can be typed in as follows: 0.58
Question 6 Not answered Marked out of 4.00 ¥ Flag question Question 7 Not answered Marked out of 3.00 ¥ Flag question One evening at a local restaurant, a manager decided to ask his patrons which meals they had cooked for themselves during the day, as opposed to eating out at a restaurant. The manager found that 30% cooked breakfast, 19% cooked lunch, and 7% cooked both meals. (Round your answers to 2 decimal places, if needed.) Hint: Drawing a Venn diagram may help. (a) What is the probability that a randomly selected patron cooked breakfast or lunch? (b) What is the probability that a randomly selected patron cooked breakfast but not lunch? (c) What is the probability that a randomly selected patron cooked lunch but not breakfast? (d) What is the probability that a randomly selected patron cooked none of their meals? A correct answer is (.42, which can be typed in as follows: 0.42 A correct answer is .23, which can be typed in as follows: 0.23 A correct answer is (.12, which can be typed in as follows: 0.12 A correct answer is (.58, which can be typed in as follows: 0.58 A survey was conducted from a large group of high school students in an effort to determine what science courses they were currently enrolled in. It was found that 76% of the students were enrolled in Chemistry, 70% of students were enrolled in Physics, and 58% of students were enrolled in Biology. Assume independence between the science classes that each student is enrolled in. (Round your answers to 3 decimal places, if needed.) (a) What is the probability that a randomly selected student is enrolled in Chemistry and Physics, but not Biology? (b) What is the probability that a randomly selected student is enrolled in Physics but not Chemistry? [ ] (c) What is the probability that a randomly selected student is enrolled in Chemistry or Biology?
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