Question: there are 30 students in a classroom . the ratio of the # of girls to boys was 1 : 2 , how many boys are there ?
A) 10
B) 15
C) 20
D) 25
E) 30
Correct answer: C
Grade: 6 | Topic: Ratios and proportions | Difficulty: Easy | Standard: 6.RP.A.3