Tuesday

January 27, 2015

January 27, 2015

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.

**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 - 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...

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...

Maths - the ratio of the number of boys to the number of girls in a class is 4:7...

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