15) A delivery route must include stops at five cities. How many different routes are possible? A) 120 B) 5 C) 32 D) 3125 8) The number of ways a jury of 12 can be selected from a pool of 20 16) A student has five motor vehicle accidents in one year and claims that having five accidents is not unusual. Use the frequency distribution below to determine if the student is correct. Accidents 0 1 2 3 4 5 Students 260 500 425 305 175 45 35) The random variable x represents the number of tests that a patient entering a hospital will have along with the corresponding probabilities. Find the mean and standard deviation. A) mean: 1.59: standard deviation: 1.09 B) mean: 1.59; standard deviation: 3.71 C) mean: 2.52; standard deviation: 1.93 D) mean: 3.72; standard deviation: 2.52 41) At a rafe, 10,000 tickets are sold at $10 each for three prizes valued at $4,800, $1,200, and $400. What is the expected value of one ticket? A) $9.36 B) $9.36 C) $0.64 D) $0.64 11) Find the variance of the binomial distribution for which n = 400 and p = 0.94. A) 22.56 B) 4.75 C} 376 D) 32.54 3) A company ships computer components in boxes that contain 90 items. Assume that the probability of a defective computer component is 0.2. Use the geometric mean to find the mean number of defective parts. Interpret the results. 13) Given: The probability that a federal income tax return is filled out incorrectly with an error in favor of the taxpayer is 20%. Question: What is the probability that of the ten tax returns randomly selected for an audit, three returns will contain only errors favoring the taxpayer? A) binomial B) geometric