In a class, there are 30 boys and 60 girls. What is the ratio of boys to the total number of students in the class?
1:3
The number of boys in the class is 30 and number of girls in the class is 60.
∴ Total number of students is equal to 30 + 60 = 90.
Ratio of number of boys to the total number of students is equal to 3090=30÷3090÷30=13=1:3