A) 5 : 9
B) 5 : 7
C) 7 : 5
D) 14 : 13
Correct Answer: C
Solution :
The proportion of Gold and Copper in C will be \[=\left( \frac{7}{9}+\frac{7}{18} \right)\,\,:\,\,\left( \frac{2}{9}+\frac{11}{18} \right)\] \[=\left( \frac{21}{18} \right)\,\,:\,\,\left( \frac{15}{18} \right)\] \[=7:5\]You need to login to perform this action.
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