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Homework: HW 4.2 Save Score: 0.67 of 1 pt 12 of 18 (18 complete) HW Score: 84.26%, 15.17 of 18 pts 4.2.21 Question Help Help Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among 142 subjects with positive test results, there are 30 false positive results. Among 153 negative results, there are 5 false negative results. Complete parts (a) through (c). (Hint: Construct a table.) a. How many subjects were included in the study? The total number of subjects in the study was 295 . b. How many subjects did not use marijuana? A total of 178 subjects did not use marijuana. c. What is the probability that a randomly selected subject did not use marijuana? The probability that a randomly selected subject did not use marijuana is (Do not round until the final answer. Then round to three decimal places as needed.)