Final answer:
The cub scouts can make 20 first aid kits.
Step-by-step explanation:
To determine the number of first aid kits the cub scouts can make, we need to determine the limiting factor between the number of band-aids and the number of antiseptic ointment packets. In this case, the limiting factor is the number of antiseptic ointment packets, as there are fewer of them compared to the band-aids. So, the maximum number of first aid kits they can make is equal to the number of antiseptic ointment packets, which is 20.
Therefore, the cub scouts can make 20 first aid kits.