Posted by **Al** on Saturday, April 21, 2012 at 5:29am.

Class A has the same number of students as Class B. The ratio of the number of girls in Class A to the number of girls in Class B is 3 : 2. The ratio of the number of boys in Class A to the number of boys in Class B is 3 : 5. What is the ratio of the number of girls to boys in Class B?

- math -
**Reiny**, Saturday, April 21, 2012 at 8:31am
Make a simple chart

....class A......class B

boys .. girls...boys .. girls

3y ...... 3x.......5y .... 2x

we know 3y+3x = 5y+2x

x = 2y

ration of girls to boys in class B

= 2x : 5y

= 2(2y) : 5y

**= 4 : 5**

There is no unique solution , just pick any value for y

e.g. using y = 5, then x = 10 (from x = 2y)

in the chart:

15.. 30....... 25 .. 20 satisfies the condition

y = 8, then x = 16

24 .. 48 ..... 40 .. 32 satisfies the condition

etc.

## Answer This Question

## Related Questions

- algebra - Classes A and B have 35 students each. If seven girls shift from class...
- algebra - Classes A and B have 35 students each. If seven girls shift from class...
- Math - The ratio of the number of boys to the number of girls in Mr. Brown's ...
- MATHS - Class A and Class B have the same number of pupils. The ratio of the ...
- Math - The ratio of boys to girls in a math class is 5 to 3. When 3 girls and 1...
- maths - In a class, there are 12 girls and 14boys. Express in its simplest form...
- Math - 5/8 of the students in my class were boys. When 6 girls joined the class...
- math - the ratio of boys to girls in class is 2:3. If Ms. Wise has 24 students ...
- Math - I don't get the first problem of my homework. We learned three lessons ...
- Math - There are 28 boys in a class which account to 78 of the whole class. Find...

More Related Questions