A person uses his car 30% of the time, walks 15% of the time, rides the bus 35% of the time and uses the train 20% of the time as he goes to work. He is on time 90% of the time when he walks or he rides the train, he is late 3% of the time when he drives; he is late 7% of the time he takes the bus. The probability he rides the train if he was late is: 0.358 0.292 0.432 0.219