Question 392153
{{{b/g = 2/3}}} and {{{b/(g-4)=4/5}}}
==> {{{b = 2g/3}}} and {{{b = 4(g-4)/5}}}
==> {{{2g/3 = 4(g-4)/5}}}
==> 5g = 6g - 24
==>g = 24, the number of girls, and
b = 16, the number of boys.