Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among

143

subjects with positive test results, there are

27

false positive results; among

159

negative results, there are

2

false negative results. If one of the test subjects is randomly selected, find the probability that the subject tested negative or did not use marijuana. (Hint: Construct a table.)

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Part 1

The probability that a randomly selected subject tested negative or did not use marijuana is

enter your response here.

(Do not round until the final answer. Then round to three decimal places as needed.)