Bunuel wrote:

In a group of 100 cars, 47 cars do not have air conditioning. If at least 51 cars have racing stripes, what is the greatest number of cars that could have air conditioning but not racing stripes?

A) 45

B) 47

C) 49

D) 51

E) 53

Kudos for a correct solution.

Source: GMATPrepNow

51 cars have racing stripes. These cars may also include the cars which have both AC and stripes.

Total number of cars is 100.

To maximize the number of cars which only have AC, we must consider the number of cars which have neither AC nor racing stripes to be 0.

Thus the number of cars with only AC will be

100-51 =49

Answer:- C