Question

If 3 kg of metal, of which 1/4   is aluminium and the rest is magnesium, be mixed with 5 kg of metal, of which  1/3 is aluminium and the rest is magnesium, then what is the ratio of aluminium to magnesium in the mixture?

A 29 : 67
B 32 : 65
C 27 : 61
D 19 : 55
E None of these
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