Respuesta :

The Answer is 3

1  Driver and 7 Passengers = 8 

19 people + 3 drivers = 23 people/8 = 3 vans,  

Proof 3*8=24 thus 1 spare seat.
3 because 7x2 is 14 and u have 19 people so 7x3=21 which is enough to seat the 19 passengers