Răspuns:
Explicație:
ms1=150g
c1=40%
ms2=450g
c2=20%
c final
- se afla md1 si md2 de la cele doua solutii
md1=c1. ms1 :100
md1=40 . 150 : 100=60g
md2=c2 . ms2 : 100
md2=20 .450 : 100=90g
-se afla md final
md f= md1 +md2
md f=60g + 90g=150 g
-se afla ms final
ms f=ms1 + ms2
ms f= 150 g + 450 g=600g
-se afla c f
c f= mdf . 100 : msf
cf=150.100 : 600=25%
