Question 1: (1) There are six sequences of three cars: getting on-waiting for the bus-getting off-getting off-getting on-waiting for the bus-getting off-waiting for the bus-waiting for the bus-waiting for the bus-getting on-waiting for the bus-getting off. The probability of A boarding the bus is 1/3, and the probability of B boarding the bus is 1/2. Because 1/3 < 1/2, the probability of B getting on the bus is greater. Question 2: According to the topic, there are 24 days with excellent air quality or above in these 30 days, so there are 365/30*24=292 days in a year.