British Sterling Silver Is a Copper-Silver Alloy That Is 7

British sterling silver is a copper-silver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams of British sterling silver should be used to prepare 222 grams of a copper-silver alloy that is 15% copper by weight?

A) 197.9 g of British sterling silver and 24.1 g of copper.
B) 204.0 g of British sterling silver and 18.0 g of copper.
C) 183.8 g of British sterling silver and 38.2 g of copper.
D) 188.7 g of British sterling silver and 33.3 g of copper.
E) 205.3 g of British sterling silver and 16.7 g of copper.

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