# Math

posted by .

There are 36 students in a student council in a school and the ratio of the number of boys to girls is 3:1 . How many more girls should be added to the council so that the ratio of boys to the number of girls may be 9:5

• Math -

36 students
B:G = 3:1 = 27 : 9

27/(9+x)=9/5
Solve for x by cross multiplication.

## Similar Questions

1. ### math

The ratio of boys to girls in a school choir is 4:3. There are 6 more boys than girls. If another 2 girls join the choir, what will be the new ratio of boys to girls?
2. ### math

the ratio of boys to total of students is 2:5.the number of girls of the student is 3. there are 123 girls.how many boys are there?
3. ### math

There are 77 students in the syudent council. The ratio of girls to boys is 7:4. How many girls are in the student council?
4. ### math/ratios

There are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council?
5. ### math/ratios

There are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council?
6. ### Estimation and Computation

The ratio of boys to girls in a class is 2:3. If a student is chosen at random to be on the student council, what is the probability it will be a girl?
7. ### MATHS

Two different schools (A and B) have the same number of pupils. The ratio of the boys in school A and the boys in school B is 2:1 and the ratio of the girls in school A and the girls in school B is 4:5. Find the ratio of the boys in …
8. ### math

the current ratio of boys to girls at a certain school is 2 to 5 . if 12 additional boys were added to the school, the new ratio of boys to girls would be 4 to 9. how many boys currently attend the school?
9. ### math

At a sports carnival,the ratio of number of pupils sent by school A,B and school C to the event was 1:2:3. The number of boys from school A and the number of girls from school B were the same. The ratio of the number of girls from …
10. ### Math grade 6, ratio

The ratio of the number of boys to the number of girls in a school choir is 4:3.there are 6 more boys than girls.if another 2 girls join the choir, what will be the new ratio of the number of boys to the number of girls in the school …

More Similar Questions