Question

Nu stiu cum se rezolva acest gen de problema, nu stiu ce formule ar trebui sa aplic. As avea nevoie de putin ajutor. Multumesc!

Answer 1

Solutia 1   +    solutia 2--------------:> Solutia 3
ms1=120g      ms2=80g                ms3=ms1+ms2=120+80=200g
c1=5%            c2=10%                    c3=?
md1=?            md2=?                      md3=md1+md2=....=6+8=14

md1=ms1*c1/100=120*5/100=6
md2=ms2*c2/100=80*10/100=8
md3=6+8=14
c3=md3*100/ms3=14*100/200=7%

sau  varianta a II-a :
ms1*c1+ms2*c2=ms3*c3
120*5+80*10=200*c3 ==> c3=7%