B/G = 4/3 so 3B = 4G
B+G = 21
Multiply by 3: 3B+3G = 63
But 3B = 4G so 4G+3G = 63 ie 7G = 63 so that G = 9
So B+G=21 means B = 12
3 more boys so B' = 12+3 = 15
1 more girl so G' = 9+1 = 10
So new ratio = B'/G' = 15/10 = 3/2 or 3 to 2
There would be 6 boy students and 18 girl students in the class.
42:31
56
18 girls
17. There should be 18, but one has gone to the toilet.
There are 18 girls and 6 boys in the class of 24 students
If there were 30 students in the class, it would mean that 2/5 are girls. Girls = 12. Boys = 18
There would be 6 boy students and 18 girl students in the class.
60%
The total number of students in the class is 18 boys + 7 girls = 25 students. The fraction of the class that are girls is calculated by taking the number of girls (7) and dividing it by the total number of students (25), resulting in 7/25. Therefore, the fraction of the class that are girls is 7/25.
18
a class of 25 students has 10 boys. Three boys have braces and 4 girls have braces..what is the ratio of boys with braces to boys in class
-21
42:31
56
18 girls
To determine the fraction of girls and boys in the class, you would need to know the total number of students in the class and the number of girls and boys. Let's say there are 20 students in the class, with 12 girls and 8 boys. The fraction of girls in the class would be 12/20 or 3/5, and the fraction of boys would be 8/20 or 2/5.