Metalsmiths call pure gold 24-karat gold because it is a ratio of 24 parts gold to 24 parts of the sample (24/24 gold). One common gold and silver alloy is called "18-karat gold" because it is 18 parts gold" to 24 parts of the alloy (18/24 gold). What is the ratio of gold to alloy in a piece of 12-karat gold?

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A: As per policy only first question is answered. Please refer to the image below

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