A bag contains thirty marbles numbered from 1 to 30. Five marbles are drawn at random from the bag.
There are a few ways to think about this:
a. Marbles are drawn one at a time without replacement. That is, once a marble is drawn, it is not replaced in the bag.
b. Marbles are drawn all at once without replacement. That is, five marbles are snatched up at once.
c. Marbles are drawn one at a time with replacement. Once a marble is drawn, it is tossed back into the bag. Then the next marble is drawn, tossed back in, and so on.

What is the probability that at least one of the marbles numbered 16, 17, 18 are among the five marbles drawn from the bag?