(a) What is the probability that of 10 laborers testing positive, 2 are cocaine users, 5 marijuana users, and 3 users of other drugs? (b) What is the probability that of 10 workers testing positive, all are marijuana users? (c) What is the probability that of 10 workers testing positive, none are cocaine users?
(a) What is the probability that of 10 laborers testing positive, 2 are cocaine users, 5 marijuana users, and 3 users of other drugs? (b) What is the probability that of 10 workers testing positive, all are marijuana users? (c) What is the probability that of 10 workers testing positive, none are cocaine users?
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...
Related questions
Question
Transcribed Image Text:Based on the study conducted by DOLE in 2000, of 4 million laborers in the general
workforce, 0.8% tested positive for drugs. Of those testing positive, 22.5% were
cocaine users and 54.4% marijuana users.
(a) What is the probability that of 10 laborers testing positive, 2 are cocaine users, 5
marijuana users, and 3 users of other drugs?
(b) What is the probability that of 10 workers testing positive, all are marijuana users?
(c) What is the probability that of 10 workers testing positive, none are cocaine users?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 3 steps with 3 images
Recommended textbooks for you
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON