The number of bacteria colonies of a certain type in samples of polluted water has a Poisson distribution with a mean of 2 per cubic centimeter (cm3) a. If four 1-cm3 samples are independently selected from this water, find the probability that at least one sample will contain one or more bacteria colonies. b. How many 1-cm3 samples should be selected in order to have a probability of approximately 0.95 of seeing at least one bacteria colony?
The number of bacteria colonies of a certain type in samples of polluted water has a Poisson distribution with a mean of 2 per cubic centimeter (cm3) a. If four 1-cm3 samples are independently selected from this water, find the probability that at least one sample will contain one or more bacteria colonies. b. How many 1-cm3 samples should be selected in order to have a probability of approximately 0.95 of seeing at least one bacteria colony?
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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The number of bacteria colonies of a certain type in samples of polluted water has a Poisson distribution with a mean of 2 per cubic centimeter (cm3)
a. If four 1-cm3
samples are independently selected from this water, find the
probability that at least one sample will contain one or more bacteria colonies.
b. How many 1-cm3
samples should be selected in order to have a probability of
approximately 0.95 of seeing at least one bacteria colony?
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