Question
In a school,the ratio of boys to girls is 9:4.If there are presently 720 girl students,how many more girls would it take to reduce the ratio of boys to girls to 2:1?
Answers
oobleck
720/4 = 180
so,
9:4 = 1620:720
Now, 1620 = 2*810
so, you need to add 810-720 = 90 girls
so,
9:4 = 1620:720
Now, 1620 = 2*810
so, you need to add 810-720 = 90 girls