0
In a class of 21 students the ratio of boys to girls is 4 to 3 Three extra boys and one extra girls join the class What is the new ratio of boys to girls?
Wiki User
∙ 14y ago
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
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
The ratio of boys 2 girls in feeling this class is 1to 3 there are 24 students in the class how many of the students are girls?
There would be 6 boy students and 18 girl students in the class.
Which group has the larger ratio of students with braces to students in class -- boys or girls?
42:31
47 of the students in a classroom are girls. If there are nine boys in the class how many total students are there?
56
There are 30 students in ms bell's fourth grade classfor every 3 girls in the class there are 2 boyshow many girls in the class?
18 girls
How many girls are in the class room if 60 percent of 30 students in the class were girls?
17. There should be 18, but one has gone to the toilet.
There are three times more girls in the class than boys. There are 24 students in the class. How many girls are in the class?
There are 18 girls and 6 boys in the class of 24 students
There are 30 students in the class three fifths of them are boys?
If there were 30 students in the class, it would mean that 2/5 are girls. Girls = 12. Boys = 18
The ratio of boys 2 girls in feeling this class is 1to 3 there are 24 students in the class how many of the students are girls?
There would be 6 boy students and 18 girl students in the class.
A class has 12 boys and 18 girls. What percent of the students in the class are girls?
60%
A class has 21 students. One third of the students are girls. How many boys are in the class?
14 boys are in the class
There are 3 times as many girls in the class than boys There is a total of 24 students in the class How many girls are in the class?
18
What is the ratio of 10 boys to 3 boys in a class?
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
There are 3 times as many girls in the class than boys-there is a total of 24 students in the class how many girls are in the class?
-21
47 of the students in a classroom are girls. If there are nine boys in the class how many total students are there?
56
Which group has the larger ratio of students with braces to students in class -- boys or girls?
42:31
There are 30 students in ms bell's fourth grade classfor every 3 girls in the class there are 2 boyshow many girls in the class?
18 girls
How many girls are in the class room if 60 percent of 30 students in the class were girls?
17. There should be 18, but one has gone to the toilet.
