Answered: (a) What is the probability that none…

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.7: Probability

Problem 50E: Flexible Work Hours In a recent survey, people were asked whether they would prefer to work flexible...

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Question

Does crime pay? The FBI Standard Survey of Crimes showed that for about 80% of all property crimes (burglary, larceny, car theft, etc.), the criminals are never found and the case is never solved. Suppose a neighborhood district in a large city suffers repeated property crimes, not always perpetrated by the same criminals. The police are investigating ten property crime cases in this district.

(a) What is the probability that none of the crimes will ever be solved? (Round your answer to three decimal places.)

(b) What is the probability that at least one crime will be solved? (Round your answer to three decimal places.)

(c) What is the expected number of crimes that will be solved?
crimes

What is the standard deviation? (Round your answer to two decimal places.)
crimes

(d) What is the smallest number of property crimes n that the police must investigate before they can be at least 90% sure of solving one or more cases?
n = crimes

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