At a factory that produces pistons for cars machine one produced 245 satisfactory Pistons and 245 unsatisfactory Pistons today machine to produce 335 satisfactory Pistons and 165 unsatisfactory Pistons today suppose that one piston for machine one and one piston for machine to is chosen at random from today's match what is the probability that the person chosen for machine one is satisfactory in the person chosen for machine to is unsatisfactory