A grade has 81 girls and 72 boys. The grade is split into groups that have the same ratio of boys to girls as the whole grade. How many girls are in a group that has 16 boys?

Question

livingakingsomeday · Answer

There are 81 girls to every 72 boys in total, which can be represented by 81/72, which put into decimal form, is 1.125. If you then take the number of boys in the group, 16, and multiply it by this number (because the problem states that the ratio is constant) you can find the number of girls in the group. 
 16*1.125=18 
 So there are 18 girls in a group with 16 boys.

UnicornCatGirl · Answer

There are 18 girls in a group with 16 boys. Hope I could help! :D

livingakingsomeday · Answer

In a group with 16 boys, there are 18 girls, maintaining the same ratio of boys to girls as in the total grade. The ratio of boys to girls in the class is 8 to 9. By setting up a proportion and solving, we find this number of girls. 
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A grade has 81 girls and 72 boys. The grade is split into groups that have the same ratio of boys to girls as the whole grade. How many girls are in a group that has 16 boys?

Answer (3)

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