SOLUTION: Some drug tests are about 90% reliable. This means that there is a probability of 0.9 that the test will correctly identify a drug user or a nonuser. To be safe, each person is tes
Algebra ->
Probability-and-statistics
-> SOLUTION: Some drug tests are about 90% reliable. This means that there is a probability of 0.9 that the test will correctly identify a drug user or a nonuser. To be safe, each person is tes
Log On
Question 1042798: Some drug tests are about 90% reliable. This means that there is a probability of 0.9 that the test will correctly identify a drug user or a nonuser. To be safe, each person is tested twice. What is the probability that a drug user will pass both tests? (Round your answer to four decimal places.) Answer by jorel555(1290) (Show Source):
You can put this solution on YOUR website! If the test is correct 90% of the time, then it is incorrect 10% of the time. The probability that a drug user will pass two tests is .1 x .1, or 1% of the time. ☺☺☺☺
(