research focused on the number of illnesses involving the organism Escherichia coli (01257:H7), which causes a breakdown of red blood cells and intestinal hemorrhage in its victims. According to the Center for Disease Control of the Department of Health, an estimated 73,000 cases of E. coli infection and 61 deaths occur in Region Y. A 2028 outbreak traced to wild pigs, who spread the bacteria into a cabbage field in that , sickened 204 people in 26 municipalities. Outbreaks have occurred at a rate of 2.5 per 100,000. Let us suppose that this rate has not changed. a. What is the probability that at most five cases of E.coli per 100,000 are reported in California this year? b. What is the probability that more than five cases of E. coli are reported in California this year? c. Approximately 95% of occurrences of E. coli involve at most how many cases?

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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A research focused on the number of illnesses involving the organism
Escherichia coli (01257:H7), which causes a breakdown of red blood cells and
intestinal hemorrhage in its victims. According to the Center for Disease
Control of the Department of Health, an estimated 73,000 cases of E. coli
infection and 61 deaths occur in Region Y. A 2028 outbreak traced to wild
pigs, who spread the bacteria into a cabbage field in that , sickened 204 people
in 26 municipalities. Outbreaks have occurred at a rate of 2.5 per 100,000. Let
us suppose that this rate has not changed.
a. What is the probability that at most five cases of E.coli per 100,000 are
reported in California this year?
b. What is the probability that more than five cases of E. coli are reported in
California this year?
c. Approximately 95% of occurrences of E. coli involve at most how many
cases?

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