There are 15 boys in a group of 35 students. What is the ratio of boys to girls in this group?

4 Answers

justaguide's profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on

The number of boys in the group is 15 and there are 35 students. This gives the number of girls as 35 - 15 = 20

The ratio of the number of boys to the number of girls is 15:20 = 3:4.

The required ratio of the number of boys to the number of girls is 3:4.

angelescobar's profile pic

angelescobar | Student, Undergraduate | (Level 1) eNoter

Posted on



Since, there are 15 boys and overall 35 students, you subtract the amount of boys and there will be 20 girls left. Now its 15/20 or 15 to 20, but simplifying that amount, you will have 3 to 4. And since you ask for the boys, it would be 4:3 in ratio format.

nerdygirl-1996's profile pic

nerdygirl-1996 | Student, Undergraduate | (Level 1) Honors

Posted on

Well first you have to find the number of girls in the class.

so you  take the number of boys from the total number of class members

35-15= 20 girls 

So the ratio from boys to girls is


which can be simplified to 

3:4 if we divide both sides by four

dinolove66's profile pic

dinolove66 | Student, Grade 9 | (Level 1) eNoter

Posted on

First you should subtract the boys with the overall students getting 20 girls. then it is 15/20 and the ration would be 3:4