there are 10 girls and 20 boys in a classroom. what is the ratio of girls to boys?  Pick.
A) 1 / 2  B) 1 / 3  C) 1 / 5  D) 10 / 30  E) 2 / 5

Rationale: if girls is 10 and boys is 20 , then 10 / 20 . so ratio of girls to boys is = 10 / 20 = 1 / 2 answer : a
Answer: A