Question

The ratio of boys to girls in a class is 4:3. there are 9 girls. how many boys are in the class?

Answer 1

For every 3 girls, there are 4 boys. if there are nine girls, that expands to three extra boys, because for every three theres an extra one. so there are 12 boys (9+3.) the final ratio, boys to girls, is 12:9.