Source: www.poll 25. Survey on Bathing Pets A survey found that 25% of pet owners had their pets bathed professionally rather than do it themselves. If 18 pet owners are randomly selected, find the probability that exactly 5 people have their pets bathed professionally. Source: USA Snapshot, USA TODAY. 26. Survey on Answering Machine Ownership In a survey, 63% of Americans said they own an answering machine. If 14 Americans are selected at random, find the probability that exactly 9 own an answering machine. Source: USA Snapshot, USA TODAY. 27. Poverty and the Federal Government One out of every three Americans believes that the U.S. government should take "primary responsibility" for eliminating poverty in the United States. If 10 Americans are selected, find the probability that at most 3 will believe that the U.S. government should take primary responsibility for eliminating poverty. Source: Harper 's Index. 28. Internet Purchases Thirty-two percent of adult Inter- net users have purchased products or services online. For a random sample of 200 adult Internet users, find the mean, variance, and standard deviation for the num- ber who have purchased goods or services online. Source: www.infoplease.com 29. Runaways Fifty-eight percent of runaways in the tod Stated are female. In 20 runaways are selected
Source: www.poll 25. Survey on Bathing Pets A survey found that 25% of pet owners had their pets bathed professionally rather than do it themselves. If 18 pet owners are randomly selected, find the probability that exactly 5 people have their pets bathed professionally. Source: USA Snapshot, USA TODAY. 26. Survey on Answering Machine Ownership In a survey, 63% of Americans said they own an answering machine. If 14 Americans are selected at random, find the probability that exactly 9 own an answering machine. Source: USA Snapshot, USA TODAY. 27. Poverty and the Federal Government One out of every three Americans believes that the U.S. government should take "primary responsibility" for eliminating poverty in the United States. If 10 Americans are selected, find the probability that at most 3 will believe that the U.S. government should take primary responsibility for eliminating poverty. Source: Harper 's Index. 28. Internet Purchases Thirty-two percent of adult Inter- net users have purchased products or services online. For a random sample of 200 adult Internet users, find the mean, variance, and standard deviation for the num- ber who have purchased goods or services online. Source: www.infoplease.com 29. Runaways Fifty-eight percent of runaways in the tod Stated are female. In 20 runaways are selected
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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Transcribed Image Text:Source: www.poll
25. Survey on Bathing Pets A survey found that 25% of
pet owners had their pets bathed professionally rather
than do it themselves. If 18 pet owners are randomly
selected, find the probability that exactly 5 people have
their pets bathed professionally.
Source: USA Snapshot, USA TODAY.
26. Survey on Answering Machine Ownership In a survey,
63% of Americans said they own an answering machine. If
14 Americans are selected at random, find the probability
that exactly 9 own an answering machine.
Source: USA Snapshot, USA TODAY.
27. Poverty and the Federal Government One out of
every three Americans believes that the U.S. government
should take "primary responsibility" for eliminating
poverty in the United States. If 10 Americans are
selected, find the probability that at most 3 will
believe that the U.S. government should take primary
responsibility for eliminating poverty.
Source: Harper 's Index.
28. Internet Purchases Thirty-two percent of adult Inter-
net users have purchased products or services online.
For a random sample of 200 adult Internet users, find
the mean, variance, and standard deviation for the num-
ber who have purchased goods or services online.
Source: www.infoplease.com
29. Runaways Fifty-eight percent of runaways in the
tod Stated are female. In 20 runaways are selected
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