Posted by **domonique** on Monday, June 1, 2009 at 7:02pm.

in a class, the ratio of boys to girls is 3/4. if there are 12 boys in the class, how many girls are there

- math -
**leslie**, Monday, June 1, 2009 at 7:05pm
for every 3 boys there is 4 girls

divide 12 by 3 and the answer is 4

multiply 4 by 4

16 This will be your answer

- math -
**Ms. Sue**, Monday, June 1, 2009 at 7:05pm
Set up a proportion. Let x = the number of girls.

3 / 4 = 12 / x

Cross multiply:

3x = 48

x = 16

## Answer this Question

## Related Questions

- Math - Mrs.Smith's class has 12 girls and 8 boys. What percent of he class are ...
- mathematics - there are 5 more girls than boys in a class. if 2 boys join the ...
- Maths - There are 40 pupils in a class. There are 10 more boys than girls. When ...
- Math 156 - The ratio of girls to boys in Mr. Maddox's class of 20 students is 3:...
- math - Juan's class has 10 girls and 15 boys. the ratio fo girl to boys in ...
- math - In a class of 80 seniors, there are 3 boys for every 5 girls. In the ...
- MATH - In Jessica's art class, the ratio of girls to boys is 3:2. If there are ...
- math - A class of 25 students has 10 boys. Three boys have braces and 4 girls ...
- math - There are 27 students in Mrs. Reeds class. The number of boys and number...
- math - There are 24 students in Mr.Hills class. The number of boys and number of...

More Related Questions