sandy wrote:
Autolot has a 2: 1 ratio of blue cars to red cars and a 6: 1 ratio of red cars to orange cars on the lot. What could be the total number of blue, red, and orange cars on the lot?
(A) 38
(B) 39
(C) 40
(D) 41
(E) 42
here 2: 1 is blue to red ratio,
6: 1 is red to orange,
so to balance blue to red's option we can be written as 12:6 (Blue: red)
so we can write the whole ration as Blue: Red: Orange as 12: 6: 1 = total 19
and is given options, 19's multiple is 38 only from options
Hence A is the answer