A company surveyed 1000 people on their age and the number of jeans purchased annually. The results of the poll are shown in the table.Jeans Purchased Annually3 or More TotalUnder 1250706018012-1816751264326019-25295212257260over 25385019121300Total832275091811000A person is selected at random. Compute the probability of the following.(a) The person is over 25 and purchases 3 or more pairs of jeans annually.(b) The person is in the age group 12-18 and purchases at most 2 pairs of jeans annually.(c) The person is in the age group 19-25 or purchases no jeans annually.(d) The person is older than 18 or purchases exactly 1 pair of jeans annually.

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Giving a test to a group of students, the grades and genders are summarized below. A B C Total Male 10 19 9 38 Female 13 16 11 40 Total 23 35 20 78 If one student is chosen at random,find the probability that the student was male OR received a grade of "B". (Leave answer to four decimal places.)
Students at a high school are selecting a new school mascot. The table below shows how students voted by class on their choices of the Cougars, Warriors, or Knights.. Freshmen Sophomores Juniors Seniors Total % Cougars 94 % 76 88 % 61 319 Warriors 35 55 16 24 130 Knights 60 21 33 86 a. What is the probability that a randomly selected student prefers the Warriors? 200 Total 189 152 Use the preceding data to estimate each of the following. (Express each response as a percentage rounded to one decimal place.) 137 171 649 b. What is the probability that a randomly selected student prefers the Cougars given that the student is a member of the freshmen class? c. What is the probability that a randomly selected student is a member of the junior class and prefers the Warriors?
Giving a test to a group of students, the table below summarizes the grade earned by gender. А B C Total 17 8 5 Male Female 13 14 15 Total 30 22 20 30 42 72 If one student is chosen at random, find the probability that the student was not a female and did not earn grade C. Round your answer to four decimal places. Submit Question 31
A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: Age 60 Number of Customers 69 97 90 50 61 58 One customer is chosen at random for a prize giveaway. (Round answers to 4 decimal places.) a. What is the probability that the customer is at least 20 but no older than 49? b. What is the probability that the customer is either older than 39 or younger than 20? c. What is the probability that the customer is at least 50?
The following table shows the results of a survey of 500 authors by a publishing company. Established Authors New Authors Total 160 340 Total 500 Compute the relative frequency of the given event if an author as specified is chosen at random. A successful author is established. Successful Unsuccessful 35 70 105 125 270 395
A university conducted a survey of 272 Sophomore, Junior, and Senior undergraduate students regarding satisfaction with student government. Results of the survey are shown in the table by class rank. Sophomore Junior Senior Total Satisfied 48 65 59 172 Neutral 16 18 9. 43 Not satisfied 16 14 27 57 Total 80 97 95 272 A survey participant is selected at random. What is the probability that he or she is a Junior or Senior? The probability that a student is a Junior or a Senior is (Round to three decimal places as needed.)
A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: Age 60 Number of Customers 77 63 99 74 81 89 One customer is chosen at random for a prize giveaway. (Round answers to 4 decimal places.) a. What is the probability that the customer is at least 40 but no older than 59? b. What is the probability that the customer is either older than 39 or younger than 20? c. What is the probability that the customer is at least 50?
A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: Age く 20 Number of Customers 87 20-29 70 30-39 69 40-49 57 50-59 75 60 85 One customer is chosen at random for a prize giveaway. (Round answers to 4 decimal places.) a. What is the probability that the customer is at least 30 but no older than 49? b. What is the probability that the customer is either older than 60 or younger than 20? c. What is the probability that the customer is at least 60?
A survey of students was conducted to study the relationship between the types of housing a student has and the student's mode of travel to class. The table below contains data gathered in that study. House Apartment Dorm Total Walk 12 44 155 211 Skateboard 26 38 108 172 Car 168 121 3 292 Total 206 203 266 675 Suppose one student is chosen at random. What is the probability the student skateboards to class? O 12.39% O 25.48% 062.79% O 6.14%
The table below summarizes a survey involving the relationship between living arrangements and grade point average for a group of students. If a student is selected randomly from this group, what is the probability that the student lives off campus? On Campus At home Apartment Totals Below 2.5 97 38 44 179 2.5 to 3.5 66 26 22 114 Over 3.5 18 5 8 31 Totals 181 69 74 324

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