ms1=200g
C1=20%
ms2=200g
C2=10%
m apa.adaugata=200g
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Cfinal=?
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md1=(c1 x ms1)/100=20x200/100=40g
md2=(c2 x ms2)/100=10x200/100=20g
m apa.total=(ms1-md1)+(ms2-md2)+ m apa.adaugata=200-40+200-20+200=540g
md final=md1+md2= 40+20=60g
Cfinal=(md final x 100)/(md final+m apa.total)=60x100/(60+540)=6000/600 =>
Cfinal=10%