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12. Pet Allergies An analyst claims that about 70% of U.S. households own either : cat or a dog, and an estimated 10% of the U.S. population is allergic to animals. a. What is the probability that exactly 1 person in a class of 20 students owns either a cat or a dog? (Assume that no two students in the class come from the same household.) b. What is the probability that at most 3 students in a class of 20 students are allergic to animals?

12. Pet Allergies An analyst claims that about 70% of U.S. households own either : cat or a dog, and an estimated 10% of the U.S. population is allergic to animals. a. What is the probability that exactly 1 person in a class of 20 students owns either a cat or a dog? (Assume that no two students in the class come from the same household.) b. What is the probability that at most 3 students in a class of 20 students are allergic to animals?

A First Course in Probability (10th Edition)
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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12 a.  put in scientific notation!   

 

 

 

 

12b.   round to nearest thousandth  

 

 

 

12. Pet Allergies An analyst claims that about 70% of U.S. households own either a cat or a dog, and an estimated 10% of the U.S. population is allergic to animals. a. What is the probability that exactly 1 person in a class of 20 students owns either a cat or a dog? (Assume that no two students in the class come from the same household.) b. What is the probability that at most 3 students in a class of 20 students are allergic to animals?
Transcribed Image Text:12. Pet Allergies An analyst claims that about 70% of U.S. households own either a cat or a dog, and an estimated 10% of the U.S. population is allergic to animals. a. What is the probability that exactly 1 person in a class of 20 students owns either a cat or a dog? (Assume that no two students in the class come from the same household.) b. What is the probability that at most 3 students in a class of 20 students are allergic to animals?
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