Consider the following scenario. Some US bank notes, n = 100, are seized on a su
ID: 3133732 • Letter: C
Question
Consider the following scenario. Some US bank notes, n = 100, are seized on a suspect. The probability that a randomly selected bank note from the general population contains cocaine is about 57%. The probability that a bank note contains cocaine if it has been involved in drug trafficking is about 83%. a. What is the probability that more than 50 notes contain cocaine if they were not involved in drug trafficking? b. What is the probability that more than 50 notes contain cocaine if they were involved in drug trafficking? c. In 2015 there were about 38.1 billion US bank notes in circulation. How many on average are contaminated with cocaine? d. What is the standard deviation in the number of US bank notes that contained cocaine in 2015? e. What is the probability that a bank note in your wallet contains cocaine?Explanation / Answer
(a) The correct answer is 7.5495x10-15 .
(b) ,(c) is correct .
(d) The answer is 96634.93
(e) The answer is true