Answer is D) 51
Let red cars be x and white cars will be 2x+3
you have to find that number by which we can get the sum of all cars, 75
now there is only number which satisfied with the x=24
so white cats are 2(24)+3=51
and total cars are white+ red
51+24 = 75
PLUS IM IN K12 IN USATESTPREP (:
