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 solvedt. Suppose a neighborhood district in a large city suffers repeated property crimes, not always perpetrated by the same criminals. The police are investigating twelve property crime cases in this district. n USE SALT (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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