A bus has 15 passenger seats. What is the minimum number of standard first-aid kits required?

You answered correctly. In buses with up to 22 passenger seats, at least one standard first-aid kit is legally required. Because this bus has 15 passenger seats, it falls into this category. The rule ensures that passengers have access to basic medical supplies in case of an emergency. The other answer is incorrect, since a first-aid kit is required even below 16 seats. Always remember: almost all buses, even with relatively few seats, need at least one standard first-aid kit on board according to German traffic regulations.