Ce cantitati din solutiile A de concentratie 10% si B de concentratie 70% trebuiesc amestecate pentru a se obtine 300 g solutie 30%?
a) 200 g sol. A si 100 g sol. B
b) 100 g sol. A si 200 g sol. B
c) 37,5 g sol A si 262,5 g sol B
d) 262,5 g sol A si 37,5 g sol B
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