finite Math 200 Question Help
7. [-/3 Points] DETAILS TANFIN12 7.6.037. MY NOTES PRACTICE ANOTHER A study conducted by the Metro Housing Agency in a midwestern city revealed the following information concerning the age distribution of renters within the city. (Round your answers to four decimal places.) Age Adult Population, % Group Who Are Renters, % 21-44 47 65 45-64 32 41 65 and over 21 65 (a) What is the probability that an adult selected at random from this population is a renter? (b) If a renter is selected at random, what is the probability that he or she is in the 21-44 age bracket? (c) If a renter is selected at random, what is the probability that he or she is 45 years old or older? Need Help? Read It Watch It 8. [-/2 Points] DETAILS TANFIN 12 7.6.038. MY NOTES PRACTICE ANOTHER The estimated probability that a Brand A, a Brand B, and a Brand C plasma TV will last at least 30,000 hr is 0.80, 0.75, and 0.70, respectively. Of the 4500 plasma TVs that Ace TV sold in a certain year, 1000 were Brand A, 1500 were Brand B, and 2000 were Brand C. If a plasma TV set sold by Ace TV that year is selected at random and is still working after 30,000 hr of use, answer the following. (Round your answers to three decimal places.) (a) What is the probability that it was a Brand A TV? (b) What is the probability that it was not a Brand A TV? Need Help? Read It 9. [-/2 Points] DETAILS TANFIN 12 7.6.041. MY NOTES PRACTICE ANOTHER A medical test has been designed to detect the presence of a certain disease. Among people who have the disease, the probability that the disease will be detected by the test is 0.9. However, the probability that the test will erroneously indicate the presence of the disease in those who do not actually have it is 0.06. It is estimated that 4% of the population who take this test have the disease. (Round your answers to three decimal places.) (a) If the test administered to an individual is positive, what is the probability that the person actually has the disease? (b) If an individual takes the test twice and the test is positive both times, what is the probability that the person actually has the disease? (Assume that the tests are independent.) Need Help? Read it Watch It 10. [-/2 Points] DETAILS TANFIN12 7.6.047. MY NOTES PRACTICE ANOTHER An insurance company has compiled the accompanying data relating the age of drivers and the accident rate (the probability of being involved in an accident during a 1-year period) for drivers within that group. Accident Age Group Insured Drivers (%) Rate (%) Under 25 16 4.5 25-44 40 2.5 45-64 30 2 65 and over 14 6 What is the probability of the following? (Round all answers to two decimal places.) (a) An insured driver selected at random will be involved in an accident during a particular 1-year period. (b) An insured driver selected at random who is involved in an accident is under 25. Need Help? Read It Watch It
