A gold smith has two qualities of gold, one of 12 carats and another of 16 carats purity. In what proportion should he mix both to make an ornament of 15 carats purity ?

A. 1 : 3

B. 2 : 3

C. 3 : 2

D. 3 : 1

Answer: Option A

Solution(By Examveda Team)

According to the question,
By using alligation method :

Ratio of quantity $$ \to \boxed{\,\,1\,\,\,\,\,\,:\,\,\,\,\,\,3\,\,}$$