Răspuns :
Numarul fetelor=f
Numarul baietilor=b
Numarul total=x
f+b=30
f=[tex] \frac{3}{5} x[/tex]=[tex] \frac{3}{5} 30= \frac{90}{5} =18[/tex]
b=[tex] \frac{5}{5}x- \frac{3}{5}x= \frac{2}{5} x[/tex]=[tex] \frac{2}{5} 30= \frac{60}{5}=12[/tex]
Numarul baietilor=b
Numarul total=x
f+b=30
f=[tex] \frac{3}{5} x[/tex]=[tex] \frac{3}{5} 30= \frac{90}{5} =18[/tex]
b=[tex] \frac{5}{5}x- \frac{3}{5}x= \frac{2}{5} x[/tex]=[tex] \frac{2}{5} 30= \frac{60}{5}=12[/tex]