Cars travelling to the George Washington Bridge from New Jersey to New York City must pay a toll. About 38 percent of the commuters use E-ZPass, which registers the toll to their account electronically. E-ZPass customers go quickly through the toll area averaging a wait time of 30 seconds because of the need to slow down. However, paying customers must queue up at the cash booths. They require an average service time of twenty seconds each with a standard deviation of 10 seconds. If cars are arriving to the toll area at an average rate of 8 per minute and there are 3 cash toll booths, what is the ratio of total time in the system for E-ZPass commuters versus cash commuters?