Subject uses drug

Question

44 (True Positive), 6(False Negative)
Subject is not a drug user
90(False Positive), 860(True Negative)

If 2 of the 1000 test subjects are randomly selected, find the probability that they all had false negative results. Is it unlikely to randomly select 3 subjects and get 3 results that are all false negative results?

a. Assume that the 3 selections are made with replacement.

b. Assume that the 3 selections are made without replacement.