math
posted by Al .
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?

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.
Respond to this Question
Similar Questions

MATHS
Class A and Class B have the same number of pupils. The ratio of the number of boys in Class A to the number of boys in class B is 3:2. The ratio of the number of girls in Class A to the number in Class B is 3:5. Find the ratio of … 
Math
In Class A there are 80 the Boy to Girl ratio is 3 to 5. In Class B the boy to girl ratio is 3 to 2. If the 2 classes combined have an equal number o fboys and girls how many students are in class B? 
Math
The ratio of the number of boys to the number of girls in Mr. Brown's class is 5:4. Which of the following can be calculated using the information given? 
algebra
Classes A and B have 35 students each. If seven girls shift from class A to class B, then the number of girls in the classes would interchange. If four girls shift from class B to class A, then the number of girls in class A would … 
algebra
Classes A and B have 35 students each. If seven girls shift from class A to class B, then the number of girls in the classes would interchange. If four girls shift from class B to class A, then the number of girls in class A would … 
maths
In a class, there are 12 girls and 14boys. Express in its simplest form, the ratio of girls to the total number of students in that class. 
Math
The ratio of boys to girls in a math class is 5 to 3. When 3 girls and 1 boy join the class, the ratio becomes 4:3. What is the least possible number of students in the class after the new students join? 
maths
There 168 students in a school. There are twice as many girls as there are boys. a) Calculate the number of girls in the school. b) the students are to be divided into seven classes so that each class has the same number of girls and … 
Math
The number of boys in a class is 10 less than twice the number of girls. Find the total number of the students in the class, if the number of boys is 5 more than the number of girls. 
Math
The number of boys in a class is 10 less than twice the number of girls. Find the total number of the students in the class, if the number of boys is 5 more than the number of girls.