sylviaappiah55 sylviaappiah55

31-01-2024
Mathematics

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The purity of gold is measured in karats, with pure gold being 24 karats. Other purities of gold are expressed as proportional parts of pure gold. Thus 18-karat gold is StartFraction 18 Over 24 EndFraction
, or 75% pure gold; 12-karat gold is StartFraction 12 Over 24 EndFraction
, or 50% pure gold; and so on. How much 16-karat gold should be mixed with pure gold to obtain 20 grams of 20-karat gold?

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