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Question

A and B are two alloys of gold and copper in the ratio 7:2 and 7:11 respectively. If equal quantities of these two alloys are melted to from a new alloy C, then the ratio of gold and copper in C is :
  1. 12:7
  2. 7:5
  3. 9:4
  4. 6:5

A
6:5
B
12:7
C
7:5
D
9:4
Solution
Verified by Toppr

Gold in C=(79+718)units

=76 units.

Copper in C=(29+1118) units

=56 units

Gold:Copper=7:6::5:6=7:5

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