GRE Sample Test 2 Quantitative Reasoning 2

Plugging In is a great way to tackle this question. Multiply the denominators of

1

4

,

1

5

and

1

3

together to get 60, which will be an easy number with which to work. Make the total number of cars 60. 60 ×

1

4

= 15 sports cars, and 60 − 15 = 45 sedans. The number of red cars is 60 × = 12. The number of red sports cars is 15 ×

1

3

= 5, which means that there are 12 − 5 = 7 red sedans. The fraction of the sedans that are red is

7

45

=0.15.