The ratio of boys to girls in a class is 3:2. If there are 30 boys, how many gir
Practice Questions
Q1
The ratio of boys to girls in a class is 3:2. If there are 30 boys, how many girls are there?
15
20
25
30
Questions & Step-by-Step Solutions
The ratio of boys to girls in a class is 3:2. If there are 30 boys, how many girls are there?
Step 1: Understand the ratio of boys to girls, which is 3:2. This means for every 3 boys, there are 2 girls.
Step 2: Identify how many parts the ratio has in total. Add the parts of boys and girls: 3 (boys) + 2 (girls) = 5 parts.
Step 3: Determine how many boys correspond to one part. Since there are 30 boys, divide the number of boys by the number of parts for boys: 30 boys / 3 parts = 10 boys per part.
Step 4: Calculate the number of girls using the number of parts for girls. Since there are 2 parts for girls, multiply the number of boys per part by the number of parts for girls: 10 boys per part * 2 parts = 20 girls.
