Răspuns :
ms1 = 100g c1 = 10% ⇒ md1 = 0,1·100 = 10 g
ms2 = 400g c2 = 8% ⇒ md2 = 0,08·400 = 32g
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ms = ms1 + ms2 = 500g md = md1 + md2 = 42g
c = 42·100/500 = 8,4%
ms2 = 400g c2 = 8% ⇒ md2 = 0,08·400 = 32g
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ms = ms1 + ms2 = 500g md = md1 + md2 = 42g
c = 42·100/500 = 8,4%
(100*10%+400*8%):(100+400)=(100*10:100 +400*8:100):500=(10 +32):500=42:500=0,08
c%=8%
c%=8%