Suppose that 20% of the residents of Illinois have the flu and that 75% of the patients going to a doctor for testing have the flu. If a practioneer in Illinois uses a test that is 60% accurate...

a. What is the probability that a patient receives a false-negative result?

b. What is the probability that a patient receives a true-negative result?

c. What is the probability of a false-negative result given that the result is negative?