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Probability of given test results

Use the given results from a test to answer the following question:

Among 143 subjects with positive test results, there are 29 false positive;
Among 155 negative results, there are 4 false negative results.

If one of the test subjects is randomly selected, find the probability that the subject tested negative or did not use crack.

The probability that a randomly selected subject tested negative or did not use crack is? _____ (do not round until final answer. Then round final answer to three decimal places as needed)

Solution Summary

This solution is comprised of detailed step-by-step calculation and analysis of the given problem related to Probability and provides students with a clear perspective of the underlying concept.