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• 197. A drawer contains four pairs of socks, with each pair a different color. One sock at a time is
• 198. At a mortgage company, 60% of calls are answered by an attendant. The remaining 40% of callers
• 199. An insurance company studies back injury claims from a manufacturing company. The insurance com
• 200. The number of traffic accidents occurring on any given day in Coralville is Poisson distributed
• 120. Two fair dice, one red and one blue, are rolled. Let A be the event that the number rolled on t
• 121. An urn contains four fair dice. Two have faces numbered 1, 2, 3, 4, 5, and 6； one has faces num
• 122. An insurance agent meets twelve potential customers independently, each of whom is equally like
• 123. A policyholder has probability 0.7 of having no claims, 0.2 of having exactly one claim, and 0.
• 124. In a given region, the number of tornadoes in a one-week period is modeled by a Poisson distrib
• 125. An electronic system contains three cooling components that operate independently. The probabil
• 126. An insurance company’s annual profit is normally distributed with mean 100 and variance 400. Le
• 127. In a group of health insurance policyholders, 20% have high blood pressure and 30% have high ch
• 128. In a group of 25 factory workers, 20 are low-risk and five are high-risk. Two of the 25 factory
• 3. Two speakers both produce sound wave of power = 400πWatt, frequency = 170 Hz, and sound velocity
• 129. The proportion X of yearly dental claims that exceed 200 is a random variable with probability
• 130. This year, a medical insurance policyholder has probability 0.70 of having no emergency room vi
• 4. Two thin lenses form a compound lens system. The front focal length (FFL) of this compound lens s
• 286, Losses follow an exponential distribution with mean 1. Two independent losses are observed. Cal
• 5. Which of the following statements is correct? (A) The surface charge density of a perfect conduct
• 212. Patients in a study are tested for sleep apnea, one at a time, until a patient is found to have
• 287. A manufacturer produces computers and releases them in shipments of 100. From a shipment of 100
• 288. For a pregnant woman, a certain test will give the outcome “not pregnant” with probability 0.10
• 131. An insurer offers a travelers insurance policy. Losses under the policy are uniformly distribut
• 213. A factory tests 100 light bulbs for defects. The probability that a bulb is defective is 0.02.
• 214. A certain town experiences an average of 5 tornadoes in any four year period. The number of yea