Question

The ratio of boys to girls at a school is 9 to 11. If 400 students attend the school, how many are girls? 50 140 220 215

Answer 1

It would be 220 because 20 students in all, 20×20 is the 400 students. so if you just multiplied the 9 and 11 by 20, it would match up with 400 students and you would have 220 girls. (This is not how most people work this out, but I hope it helped).