A manufacturer of flashbulbs knows that 5 percent of his product is defective. Suppose he will return the full price of a shipment of 2000 flashbulbs if “b" or more bulbs are defective. What should...

Extracted text: A manufacturer of flashbulbs knows that 5 percent of his product is defective. Suppose he will return the full price of a shipment of 2000 flashbulbs if “b" or more bulbs are defective. What should the approximate value of "b" be so that he must give the refund on at most 1 percent of the shipments he sells?