The ratio of girls to boys in the school is 3 to 1. If there is a total of 400 students, how many are boys?
The total ratio representing the number of students in school is 3+1 = <<3+1=4>>4
If the total number of students in school is 400, the fraction representing one part of the total ratio is 400/4 = <<400/4=100>>100 students
There are 100 students for each part of the ratio representing the number of students in school.
If three parts represent girls in the school, there are 3*100 = <<3*100=300>>300 girls.
If one part represents the boys in the school, there are 1*100 = <<1*100=100>>100 boys. Answer: \boxed{100}.
To find out how many students are boys, we need to first determine the total number of parts in the ratio.
The ratio of girls to boys is given as 3 to 1, which means for every 3 parts of girls, there is 1 part of boys.
Therefore, we have a total of 3 + 1 = 4 parts in the ratio.
To find the number of boys, we need to divide the total number of students by the number of parts in the ratio and then multiply by the number of parts representing the boys.
So, the number of boys is (1/4) * 400 = 100.
Therefore, there are 100 boys in the school.
To find out how many boys are in the school, we need to determine the ratio of girls to boys and then apply that ratio to the total number of students in the school.
The given ratio is 3 to 1, which means there are 3 girls for every 1 boy. This ratio can be written as 3:1 or in fraction form, 3/1.
To calculate the number of boys, we need to divide the total number of students by the sum of the parts of the ratio. In this case, the sum of the parts is 3+1=4.
Let's set up an equation:
Number of Boys / Total number of students = Ratio of boys / Sum of the parts of the ratio
Number of Boys / 400 = 1 / 4
To solve for the number of boys, we can cross multiply:
Number of Boys = (1/4) * 400
Simplifying:
Number of Boys = 400/4
Number of Boys = 100
Therefore, there are 100 boys in the school.