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 answer must be a whole number.(1 p
The ratio of girls to boys is 3 to 1, which means that for every 3 girls, there is 1 boy.
If we let x represent the number of groups of 3 girls, then we have x + 1 groups of students (3 girls + 1 boy) in total.
Since each group consists of 3+1 = 4 students, the total number of students is 4(x+1).
We are given that the total number of students is 400, so we have the equation 4(x+1) = 400.
Expanding the equation gives us 4x + 4 = 400.
Subtracting 4 from both sides of the equation gives us 4x = 396.
Dividing both sides of the equation by 4 gives us x = 99.
Therefore, there are x+1 = 99+1 = <<99+1=100>>100 groups of students.
Since each group consists of 3 girls and 1 boy, the total number of boys is 100 * 1 = <<100*1=100>>100 boys. Answer: \boxed{100}.