Without properly working spark plugs, a vehicle will not run. For a specific vehicle, the spark plugs are supposed to have a gap between 0.7mm and 0.9mm. Any spark plugs with gaps larger or smaller than this will fail the inspection and be discarded. At the factory, the machine that sets the gap follows a normal distribution with a mean of 0.8mm and a standard deviation of 0.075mm. What is the probability that a randomly selected spark plug passes inspection?