SOLUTION: In a gym class, the ratio of girls to the total number of students is 3:8 . There are 10 boys in the gym class. How many students are in the gym?

Question 797513: In a gym class, the ratio of girls to the total number of students is 3:8 . There are 10 boys in the gym class. How many students are in the gym?
Answer by jerryguo41(197) (Show Source): You can put this solution on YOUR website!
Proportions can be written as fractions

But you only have number of boys, so you can find the proportion of boys in class by subtracting . This means the ratio of boys to students is . Since you can only have boys or girls the remainder of the class must be boys which is why is true.

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