送交者: gyro 于 2006-4-07, 15:37:38:
回答: A probability distribution problem: 由 steven 于 2006-4-07, 14:37:32:
the average number of people arriving per second is less than the capacity of the train per second. Then there is a steady state problem, and you can ask the PDF of the number of people getting on the train.
Shouldn't the "capacity" be a constant? Only the number of people getting on the train is a proper random variable.