SOLUTION: eighteen karat gold contains 18 parts gold and 6 parts other metals. amy's new ring contains 12 parts gold and 3 parts other metals. is the ring 18 karat gold? why?
Question 679169: eighteen karat gold contains 18 parts gold and 6 parts other metals. amy's new ring contains 12 parts gold and 3 parts other metals. is the ring 18 karat gold? why? Answer by ptaylor(2198) (Show Source):
You can put this solution on YOUR website! 18 Karat gold contains 18 parts gold and 6 parts other metals. This means that out of every 18+6=24 parts 18/24 is gold (75%) and 6/24 is other metals(25%).
If Amy's new ring contains 12 parts gold and 3 parts other metals that means that out of every 12+3=15 parts 12/15 is gold (80%) and 3/15 is other metals(20%).
The answer is NO!. Amy's ring is more pure than 18 Karat gold.
Hope this helps---ptaylor
