The ratio of boys to girls in Hania's class is 10 to 15. There are 20 boys. How many girls are there

Question

The ratio of boys to girls in Hania's class is 10 to 15. There are 20 boys. How many girls are there

Answer 1

b = number of boys = 20

g = number of girls

 

b/g = 10/15 = 2/3

 

g = b / (2/3) = 20 / (2/3) = 60/2 = 30

 

30 girls, 20 boys