How Many Brown People Does It Take…

Here is the problem:

so here is a problem:

family of 4 – car
family of 4 – van
family of 3 – car
family of 5 – car

we’re going to end up parking one car at the airport since its only 15 minutes away.

what’s the best way to get everyone to the airport and be left with one car at the airport and all the other cars parked back at home?