A large microprocessor chip contains multiple copies of circuits. If a circuit fails, the chip knows it and knows how to select the proper logic to repair itself. The average number of defects per chip is 300. What is the probability that 10 or fewer defects will be found in a randomly selected region that comprises 5% of the total surface area? What is the probability that more than 10 defects are found? ("Self-Repairing Chips," Datamation, May, 1983, p. 68.)