330 MCGRAW-HILL’S SAT
- When the Apex Pet Store first opened, the ratio of
cats to dogs was 4 to 5. Since then, the number of
cats has doubled, while the number of dogs has
increased by 12. If the ratio of dogs to cats is now
1 to 1, how many cats did the store have when it
opened? - Hillside High School has 504 students. One-quarter
of the students are sophomores, and 3/7 of the
sophomores are boys. If one-third of the sopho-
more girls take French, how many sophomore
girls do nottake French?
(A) 24
(B) 36
(C) 48
(D) 72
(E) 126
9. A jar contains only red, green, and blue marbles.
If it is three times as likely that you randomly
pick a red marble as a green marble, and five
times as likely that you pick a green one as a blue
one, which of the following could be the number
of marbles in the jar?
(A) 38
(B) 39
(C) 40
(D) 41
(E) 42
....1 2 3 4 5 7 8 9610 2 3 4 5 7 8 9610 2 3 4 5 7 8 9610 2 3 4 5 7 8 96