From a survey of 20,000 eligible voters, it was found that 13200 were employed, 5000 were unemployed and the rest were self-employed. Furthermore, it was found that 34%, 57%, 73% of eligible voters who were employed, unemployed and self-employed respectively voted in the last presidential election. a) If a person who voted in the last election is selected at random, what is the probability that he/she was self-employed? b) What is the probability of an eligible voter not being unemployed given that he/she did not vote in the last election?

From a survey of 20,000 eligible voters, it was found that 13200 were employed, 5000 were unemployed and the rest were self-employed. Furthermore, it was found that 34%, 57%, 73% of eligible voters who were employed, unemployed and self-employed respectively voted in the last presidential election. a) If a person who voted in the last election is selected at random, what is the probability that he/she was self-employed? b) What is the probability of an eligible voter not being unemployed given that he/she did not vote in the last election?

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...

See similar textbooks

Similar questions

If eight distince dice are rolled, what is the probability that all six numbers are rolled?
According to Motor Trend magazine, 20% of all US households own a pickup truck. We pick 9 households at random. a) Find the probability that exactly 5 of these households own a pickup truck. b) Find the probability that less than 4 of these households own a pickup truck. c) What is the expected number of households who own a pickup truck?
Printer circuit boards are functionally tested after being filled with semiconductor chips.being held. One group contains 150 cards and 20 are selected for functional testing. a) if 20 Cards are defective, what is the probability that there will be at least 1 defective card in this sample? b) if 5 cards are defective, what is the probability that there will be at least 1 defective card in this sample?
A new drug is being tested that causes a serious side effect in 5 out of 20 patients. Fifteen patients are without any serious side effect. a) What is the probability that no side effects occurs in a sample of 10 patients taking the drug? b) What is the probability that at least one side effect occurs in a sample of 10 patients taking the drug?
The denver post reported that a recent audit of Los Angeles 911 calls showed that 85% were not emergencies. Suppose the 911 operators in Los Angeles have just received 4 calls. a) what is the probability that all four calls are, in fact, emergencies ? (Round answer to five decimal places) b) what is the probability that two or more calls are not emergencies? (Round to five decimal places) c) what is the smallest number of calls that the 911 operators need to answer to be at least 93% or more sure that at least one call is an emergency? (Round to whole number)
a) A recent poll found that the mayor of a small town had the approval of 52% of the population. A new poll is being conducted one week before the election with a total of 324 randomly selected individuals. What is the probability that this poll finds the mayor’s approval below 50% ? b) It is estimated that 13.1% of Americans are left handed. What is the probability that a random sample of 100 Americans has between 10 and 15 left-handed people?
A national survey found that 42% of adults ages 25-29 had only a cell phone and no landline. Suppose that five 25-29-year-olds are randomly selected. a) What is the probability that all of these adults have only a cell phone and no landline? (Round to four decimal places as needed)
c. In a poll, 500 individuals of different ages were asked to specify if they are in favour of a newly proposed law. The poll results, categorized by age group, are displayed in the following table: In Favour? \ Age Group Yes No Unsure 16-39 98 43 32 40-59 72 75 19 Find the probability that an individual picked at random: is older than 39 and is in favour of the proposed law; i. ii. is against the proposed law given that they fall in the age group 40-59; iii. falls in the age groups below 60 years given that they are unsure. 60+ 56 84 21
A survey of 200 people, has found that 75 owned only mutual funds, 35 owned stocks, and 90 owned both. a) What is the probabality that an idividual own neither any stocks nor any mutual funds? b) What is the probability that an individual owns either a mutual fund?
A lot of 100 nylon connectors contains 10 that are defective. Two are selected, at random, without replacement, from the lot. Determine the probability that the second nylon connector is defective.