Final answer:
Bus A and Bus B will next leave the bus station at the same time after 75 minutes.
Step-by-step explanation:
Bus A leaves the station every 75 minutes and Bus B leaves the station every 15 minutes. To find out when they will next leave at the same time, we need to find the least common multiple (LCM) of 75 and 15.
The LCM of 75 and 15 is 75 minutes. Therefore, Bus A and Bus B will next leave the bus station at the same time after 75 minutes.