Question 23622
10 of the 22 are neither vans nor red.
That leaves 12 that may be van, red, or red-vans
8 of the 12 are vans, some of which may be red
That leaves 4 that are strickly red.
But you were told there are 6 red vehicles.
Two of those red vehicles must be vans.

cheers,
Stan H.