Three litres of water 1g/cm^3 is added to twelve litres of alcohol density 0.8g/cm^3.What is the density of the mixture?

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  1. density = total mass/total volume
    3 l of water ----> 3000g
    12 l of alcohol ----> 12000(.8) = 9600 g

    density = (3000+9600)g/15000 cm^3
    = ....

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