There are 15 girls in a class of 27 students. The ratio of boys to girls in this class is
(A) $4: 5$
(B) $5: 3$
(C) $3: 4$
(D) $4: 9$
(E) $9: 5$
If 15 of 27 students in the class are girls, then the remaining $27-15=12$ students are boys. The ratio of boys to girls in the class is $12: 15=4: 5$.

ANSWER: (A)