15. All the fourth-graders in a certain elementary school took a standardized test. A total of85% of the students were found to be proficient in reading, 78% were found to be proficientin mathematics, and 65% were found to be proficient in both reading and mathematics. Astudent is chosen at random.What is the probability that the student is proficient in mathematics but not in reading?What is the probability that the student is proficient in reading but not in mathematics?What is the probability that the student is proficient in neither reading normathematics?а.b.С.

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Answered: 15. All the fourth-graders in a certain…

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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A survey of 200 college graduates who have been working for at least three years found that 85 owned only mutual funds, 35 owned only stocks, and 80 owned both. a. What is the probability that an individual owns a stock? A mutual fund? b. What is the probability that an individual owns neither any stocks nor mutual funds? c. What is the probability that an individual owns a stock, a mutual fund, or both? a. The probability that an individual owns a stock is (Round to two decimal places as needed.) Enter your answer in the answer box and then click Check Answer ls Check Answer parts remaining Clear All This course (SummerA-QMB3200-U03A ApplicationofQuantitativeMethodsinBusiness) is based on Evans: Business Analytics: Methods, Models, and Decisions, 3e or anything Prsc F9 F10
4. At a High school, 70% of the seniors have taken an advance calculus course. Of those who have taken Advanced Calculus, 60% will apply for a Pre-Health science major when they apply for college admission. Of those who have not taken advanced calculus, 40% will apply for a Pre-Health science major when they apply for college admission. A senior is selected at random. What is the probability that the senior have taken advanced calculus, given that the senior will apply for a pre-health science major?
In a certain town, 62% of the residents enjoy riding roller coasters. Alfred takes a sample of 75 residents from this town. What is the probability that fewer than 58% of the residents in the sample enjoy riding roller coasters? 0.238 0.433 0.714 0.762
Approximately 20% of U.S. workers are afraid that they will never be able to retire. Suppose 10 workers are randomly selected. a. What is the probability that none of the workers is afraid that they will never be able to retire?
5B. John packs four t shirts for a trip to the beach. If he owns nine t shirts, four of which are black, and he randomly picks which four to pack, what is the probability that he packs the four black ones?
A large construction company has a workforce that is 80% men. Two workers are selected at random. What is the probability that both workers are of the same gender?
Of the inhabitants of a certain native village in Africa, 80% are known to have a particular eye disorder. On a day, there are 12 people waiting to consult a doctor at the clinic. A. What is the probability that exactly 8 of them have the eye disorder? (2m) B. What is the most likely number of them to have the eye disorder?
Twenty five percent of the employees of a company have a bachelor's degree. Of those, 35% are in a supervisory position. Of those who do not have a bachelor's degree, 18% are in a supervisory position. What is the probability that a random selected employee is in a supervisoryposition? What is the probability that a randomly selected supervisor has a bachelor's degree?

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