Question

A and B are two alloys of gold and copper prepared by mixing metals in the ratio of 5:3 and 5:11 respectively. Equal quantities of these alloys are melted to form a third alloy C. The ratio of gold and copper in alloy C is:

A

25:13

B

33:15

C

15:17

D

17:15

Hard

Solution

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Correct option is C)

Total quantities of Alloy

Total quantity of Alloy

LCM of and is .

Then we have quantity of A in C as

We have quantity of A and B as

Hence the ratio is .

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