Consider a pool of six I/O buffers. Assume that any buffer is just as likely to be available (or?

... occupied) as any
other. Compute the probabilities associated with the following events:
A = “ At least two but no more than five buffers occupied.”
B = “At least three but no more than five buffers occupied.”
C = “ All buffers available or an even number of buffers occupied.”
Also determine the probability that at least one of the events A, B, and C occurs