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Twenty identical looking packets of white power are such
Chapter 3, Problem 104E(choose chapter or problem)
Problem 104E
Twenty identical looking packets of white power are such that 15 contain cocaine and 5 do not. Four packets were randomly selected, and the contents were tested and found to contain cocaine. Two additional packets were selected from the remainder and sold by undercover police officers to a single buyer. What is the probability that the 6 packets randomly selected are such that the first 4 all contain cocaine and the 2 sold to the buyer do not?
Questions & Answers
QUESTION:
Problem 104E
Twenty identical looking packets of white power are such that 15 contain cocaine and 5 do not. Four packets were randomly selected, and the contents were tested and found to contain cocaine. Two additional packets were selected from the remainder and sold by undercover police officers to a single buyer. What is the probability that the 6 packets randomly selected are such that the first 4 all contain cocaine and the 2 sold to the buyer do not?
ANSWER:
Solution:
Step 1 of 3:
The aim is to find the probability that the 6 packets randomly selected are such the first 4 all contain cocaine and the 2 sold to the buyer do not.