Ratio question???

That is impossible that the question asks you to find the ratio of the numbers of girls in the school.
The definition of ratio is that, the two numbers (or above) are a1 and a2 (or a3,a4......an) respectively, the simplest form of ratio is (a1/r):(a2/r):(a3/r):(a4/r):(a5/r):......(an/r)
Where ai/r (i=1,2,3,......n) is an integer which is not 0.
Ratio is used to compare several of numbers relatively, it is impossible to compare the numbers of girls in the school. Unless there is some special condition.
Because the question states that, the [numbers] of girls, which indicates there are not only one number. Therefore, please give the whole question.

2007-02-19 13:18:07 補充：
補充:
r is the H.C.F of ai

good ans.

Maybe just simply answer like:
The no. of boy:girl
=xx:yy

girls : all