9. It is estimated that 4000 of the 10,000 voting residents of a town are against a new sales tax. If 15eligible voters are selected at random and asked them opinion, what is the probability that at most 7favor the new tax?

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Answered: 9. It is estimated that 4000 of the…

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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Similar questions

5. A bag contains 20 purple marbles, 15 red marbles, and 5 blue marbles. What is the probability of randomly selecting a purple marble, not putting it back, and then randomly selecting a blue marble? (Express your answer as a decimal rounded to two places.)
19. In a certain college, 33% of the physics majors belong to ethnic minorities. If 10 students are selected at random from the physics majors, what is the probability that exactly 2 belong to an ethnic minority? 20. Use the information in the previous question to find the probability that at most 2 students belong to a minority.
12. Find the probability that at most 5 defective fuses will be found in a box of 200 fuses if experience shows that 2 per cent of such fuses are defective.
3. Among the products of the first company, defective is 10%, the second - 20%, the third - 25%. We bought 6 products from the first company, 8 from the second and 4 from the third. For verification, one product was tested. Find the probability that it is valid.
10) According to the American Academy of Ophthalmology, there is a 45% chance that someone will have brown eyes. What is the probability that all of the next seven people selected will have brown eyes?
1. An average of 3 cars arrived at a highway tollgate every minute. What is the probability that at most 45 cars will arrive in a quarter of an hour.
7. A container has 5 red dice, 3 green dice and 4 black dice. If you randomly pick 2 marbles from the bag. one at a time, what is the probability that both will be red?
16. Ten percent of the students at a certain college are non-resident. A reporter for the student paper would like to interview at least 5 non-residents. If the reporter randomly selects 100 names from the student directory and begins contacting them, what is the probability that she will contact at least 5 non-resident students?

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9. It is estimated that 4000 of the 10,000 voting residents of a town are against a new sales tax. If 15 eligible voters are selected at random and asked them opinion, what is the probability that at most 7 favor the new tax?