In a class, there are 15 girls and 35 boys. What is the ratio of girls to boys
The ratio of girls to boys is 15:35 or simplified to 3:7.
The proportion of girls to boys in a class is 1:4. If there are 45 pupils in the class how many girls are there
If the proportion of girls to boys is 1:4, then for every 1 girl, there are 4 boys.
Let's call the number of girls in the class "x".
We know that the total number of pupils in the class is 45. So, the number of boys in the class is 45 - x.
Using the proportion, we can write:
x/(45-x) = 1/4
To solve for x, we can cross-multiply:
4x = 45 - x
Simplifying:
5x = 45
x = 9
So there are 9 girls in the class.
To find the ratio of girls to boys, you need to compare the number of girls and boys in the class. In this case, there are 15 girls and 35 boys.
To calculate the ratio, divide the number of girls by the number of boys:
Ratio of girls to boys = Number of girls / Number of boys
Ratio of girls to boys = 15 girls / 35 boys
Simplifying the ratio, you can divide both numbers by 5:
Ratio of girls to boys = 3 girls / 7 boys
Therefore, the ratio of girls to boys in the class is 3:7.