Results from a Marijuana Drug Test Study Showed 143 Subjects

Multiple Choice

Results from a marijuana drug test study showed 143 subjects with positive test results including 24 false positive results. There were 157 negative results, including 3 false negative results. What is the probability that a randomly selected subject did not use marijuana?

A) 0.523
B) 0.477
C) 0.593
D) 0.533