Friday

August 1, 2014

August 1, 2014

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

- math -
**Reiny**, Saturday, April 21, 2012 at 8:31amMake 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.

**Related Questions**

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 - I don't get the first problem of my homework. We learned three lessons ...

math - There are 27 students in Mrs. Reeds class. The number of boys and number...

Math - There are 28 boys in a class which account to 78 of the whole class. Find...

math - There are 24 students in Mr.Hills class. The number of boys and number of...

Math - In Class A there are 80 the Boy to Girl ratio is 3 to 5. In Class B the ...

math - In a class of 80 seniors, there are 3 boys for every 5 girls. In the ...

math - On a class trip there wre 30 more girls than boys.The total number of ...

Maths - There are 36 pupils in a class. Each girl is given 8 books and each boy ...