A shelf in the Metro Department Store contains 95 colored ink cartridges for a popular ink-jet printer. Six of the cartridges are defective.
(a) If a customer selects 3 cartridges at random from the shelf, what is the probability that they are all defective? (Round your answer to five decimal places.)
(b) If a customer selects 3 cartridges at random from the shelf, what is the probability that at least 1 is defective? (Round your answer to three decimal places)