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Problem 40E: Chapter: CH6 Problem: 40E Refer to Exercise. A similar analysis produced these joint probabilities. Enrollment Violent Crime Committed This YearNo Violent Crime Committed Less than 300 159 .091 300 to 499 221 065 500 to 999 289 063 1,000 or more .108 004 Source: Statistical Abstract of the United States, 2009, Table 237. a. What is the probability that a school with an enrollment of less than 300 had at least one violent crime during the year? b. What is the probability that a school that has at least one violent crime had an enrollment of less than 300? Exercise Violent crime in many American schools is an unfortunate fact of life. An analysis of schools and violent crime yielded the table of joint probabilities shown next. Level Violent Crime Committed This Year No Violent Crime Committed Primary 393 .191 Middle 176 010 High School 134 007 Combined 074 015 Source: Statistical Abstract of the United States, 2009, Table 237. If one school is randomly selected find the following probabilities. a. Probability of at least one incident of violent crime during the year in a primary school b. Probability of no violent crime during the year