Ratio and Proportion Practice Test 3

Question : 36 of 40

Marks: +1, -0

A and B are two alloys of gold and copper prepared by mixing metals in proportions 7 : 2 and 7 : 11 respectively. If equal quantities of the alloys are melted to form a third alloy C, the proportion of gold and copper in C will be

5 : 9
5 : 7
7 : 5
9 : 5

Validate

Solution:

Gold in C

=(7/9+7/18)=21/18=7/6

Copper in C

=(2/9+11/18)=15/18=5/6

∴ Gold : Copper

=7/6:5/6=7:5

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