Răspuns:
c1=20%
c2=40%
ms1/ms2=1/2
ms1+ms2=900g
rezolvand sistemul de doua ecuatii, rezulta ms1=300g ms2=600g
c1=md1x100/ms1---> md1= 20x300/100g=60g
c2=md2x100/ms2---> md2= 40x600/100g=240g
c3= md3x100/ms3 md3= 60+40=>300g
ms3= 900g
c3= 300x100/900=33,3%
Explicație:
