the brushes in the motors that control the conveyor belts at delectable delights need to be replaced periodically. since there are many conveyor belts through the buildings, a supply of brushes is always kept on hand. the brushes come in shipments of 1000 from a supplier who claims that no more than 2% will be defective. out of each shipment, a random sample of 15 brushes is selected for testing. if there are more than 1 defective brushes in the sample, the shipment will be rejected. assume that all 15 brushes will be tested.