Răspuns:
C%=md supra ms×100
ms=md+mapa
ms1= 100 g saramura
C1=20%
ms2=300 g saramura
C2=10%
C=md / ms ×100
C= md1+md2 ×100 / ms1 +ms2+mapa
C1=md1/ms1 ×100
20=md1/100 ×100
md1 =20 ×1 =20 g
C2=md2 /ms2 ×100
10 =md2/300 ×100
Md2= 3 g
C= 20 +3 /1000 ×100
= 23/10=2,3