Assume that the whole population we are concerned withare librarians and farmers.You know that for each librarian there are 20 farmers.Amongst all farmers only 10% are shy and quiet.Amongst all librarians 80% are shy and quiet.(a) What percentage of the population are shy and quiet?(b) You meet a person who looks shy and quiet. What is the probability that theyare a librarian?(c) Explain the result of part (b) intuitively (that is, without using numbers orformulae).

Answered: Assume that the whole population we are…

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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(Devore: Section 2.4 #49) The accompanying table gives information on the type of coffee selected by someone purchasing a single cup at a particular airport kiosk. Small Medium Large 20% 26% 10% Regular 14% Decaf 20% 10% Consider randomly selecting such a coffee purchaser. (a) What is the probability that the individual purchased a small cup? A cup of decaf coffee? (b) If we learn that the selected individual purchased a small cup, what now is the probability that he/she chose decaf coffee? (c) If we learn that the selected individual purchased decaf, what now is the probability that a small size was selected?
I need help solving this problem: Subjects for the next presidential election poll are contacted using telephone numbers in which the last 4 digits are randomly selected (with replacement). Find the probability that for one such phone number, the last 4 digits include at least one 0.
(a) Student A would like to visit a country where 92% of the population speaks the native language. However, Student A does not speak and understand that language. What is the probability that at least two of three locals at the immigrant department of the airport will succeed to communicate with Student A? Answer = Answer (b) Research Scientist A investigates the infected laboratory rats in modeling human diseases. Research Scientist A finds out the probability of the laboratory rats getting infected is two out of ten. What is the probability that five laboratory rats must be required before Research Scientist A finds at least three laboratory rats but not all have been infected? Answer = Answer (c) A badminton game consists of at least two matches, and each match consists of 21 points. The probability of Player A and Player B earning a point in their matches are 80% and 90%. What is the probability difference between Player A and Player B to get their second points within…
(TATTOOS MAY LOOK UGLY IN OLD AGE) Among 250 employees of a Tattoo Company, a total of 130 have tattoos. There are 150 males working for this company and 85 of the males have Tattoos while uwmit tattoos. Tattoo Artist v What is the probability that an employee selected at random: Is A. 0.78 a female? B. 0.6000 v What is the probability that an employee selected at random: c. 0.26 has a tattoo? D. 0.18 v What is the probability that an employee selected at random: Is a female and has a tattoo? v What is the probability that an employee selected at random: Is E. 0.4800 F. 0.40 a male and does not have tattoo? G. 0.66 v What is the probability that an employee selected at random: Is male or has a tattoo? v What is the probability that an employee selected at random: 1. 0.2200 Is a female or does not have a tattoo? v Assume we selected a female of the company, what is the conditional probability she has no tattoo? H. 0.52 I. 0.55 K. 0.5667 Assume we selected a male from the company, what…
A certain style of shoes made by a company comes in blue, red, black, and white. From experience, the company knows the blue shoes are the most popular with 33% of the sales. This is followed by the red and black shoes respectively with sales of 26% and 25% for this style of shoes. The probability is ____________________ that for 10 randomly selected orders that 3 would be for the blue shoes, 2 for the red shoes, 1 for the black shoes, and the remaining orders for the white shoes.
1
Example 2.17 Of the voters in a city, 40% are Republicans and 60% are Democrats. Among the Republicans 70% are in favor of a bond issue, whereas 80% of the Democrats favor the issue. If a voter is selected at random in the city, what is the probability that he or she favor the bond issue?
According to the college registrar's office, 45% of students enrolled in an introductory statistics class this semester are freshmen, 20% are sophomores, 25% are juniors, and 10% are seniors. You want to determine the probability that in a random sample of five students enrolled in introductory statistics this semester, exactly two are freshmen. (a) Describe a trial. Can we model a trial as having only two outcomes? If so, what is success? What is failure? Choose one of the statements below:A. A trial consists of looking at the class status of a student enrolled in introductory statistics. Yes we can model this trial with "freshman" being a success and "any other class" as a failure.B. A trial consists of looking at the class status of a student enrolled in introductory statistics. Yes we can model this trial with "junior" being a success and "any other class" as a failure.C. A trial consists of looking at the class status of a student enrolled in introductory statistics. Yes we can…

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