A person records the mode of transportation, train or car, used to get to work and whether or not the person was in bed by 10 : 00 p. m. Last month, the person only used a car to travel to work and was in bed by 10 : 00 p. m. 25 % of the time. The person plans to use a train to travel to work for the next 60 workdays. On how many of the next 60 workdays would the person go to bed by 10 : 00 p. m. to indicate that the event “The person goes to bed by 10 : 00 p. m. ” is independent of the mode of transportation used to travel to work? A) 15 days
B) 25 days
C) 35 days
D) 45 days