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In a rare coin collection, there is one gold coin for every three non-gold coins. 10 more gold coins are added to the collection and the ratio of gold coins to non-gold coins would be 1:2. Based on…

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In a rare coin collection, there is one gold coin for every three non-gold coins. 10 more gold coins are added to the collection and the ratio of gold coins to non-gold coins would be 1:2. Based on the information, the total number of coins in the collection now becomes
  1. 90
  2. 80
  3. 60
  4. 50

Answer and explanation

Correct answer: A - 90
Gold gg, non-gold 3g3g. g+103g=12\frac{g + 10}{3g} = \frac{1}{2} gives g=20g = 20, non-gold 60. New total = 30 + 60 = 90.

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  • CUSAT CAT Five-Year LL.B.

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