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 whole
The ratio of girls to boys is 3 to 1, which means that for every 3 girls, there is 1 boy.
Let's assume the number of girls is 3x and the number of boys is x.
Therefore, the total number of students is 3x + x = 4x.
Given that the total number of students is 400, we can set up the equation:
4x = 400
Dividing both sides of the equation by 4, we get:
x = 100
Therefore, the number of boys is x = 100.
To determine the number of boys in the school, we first need to find the ratio of girls to boys.
Given that the ratio of girls to boys is 3 to 1, we can calculate the total number of units:
3 units (girls) + 1 unit (boys) = 4 units
Since the total number of students is 400, we need to find the value of 1 unit:
1 unit = 400 students / 4 units = 100 students
Therefore, the number of boys in the school is 1 unit (boys) * 100 students/unit = 100 boys.
To find the number of boys in the school, you first need to determine the total number of parts in the ratio. In this case, the ratio is given as 3 to 1, which means there are 3 + 1 = 4 parts in total.
Next, you need to divide the total number of students (400) by the total number of parts (4) to determine the value of each part.
400 students ÷ 4 parts = 100 students per part.
Since the ratio states that there are 3 parts for girls and 1 part for boys, you can multiply the value of each part (100) by the number of parts for boys (1).
100 students per part × 1 part = 100 boys.
Therefore, there are 100 boys in the school.