a. What is the probability that 15 or more of these consumers have called an information line for a product? b. What is the probability that more than 20 of these consumers have called an information line for a product? c. What is the probability that fewer than 10 of these consumers have called an information line for a product?

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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An increasing number of consumers believe they have to look out for themselves in the marketplace.  According to a survey conducted by the Yankelovich Partners for USA Weekend magazine, 60% of all consumers have called an information line for a product.  Suppose a random sample of 25 consumers is contacted and interviewed about their buying habits.

 

a. What is the probability that 15 or more of these consumers have called an information line for a product?
b. What is the probability that more than 20 of these consumers have called an information line for a product?
c. What is the probability that fewer than 10 of these consumers have called an information line for a product?
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