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)

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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