Most railroad cars are owned by individual railroad companies. When a car leaves

Most railroad cars are owned by individual railroad companies. When a car leaves its home trackage it becomes part of a national pool of cars and can be used by other railroads. The riles governing the use of these pooled cars are designed to eventually return the car tothe home trackage. A particular rairoad found that each month 10% of its boxcars on the home trackage left to join the national pool and 33% of its box cars in the national pool were returned to the home trackage. If these percentages remainvalid for a long period of time what percentage of its boxcars can this railroad expect to have on its home trackage in the long run?