Two alloys contain platinum and gold in the ratio of 1 2 and 1 3 respectively A third alloy C is for...........

Quantitative Aptitude ( CCS) Mixture and Alligation

Two alloys contain platinum and gold in the ratio of 1:2 and 1:3 respectively. A third alloy C is formed by mixing alloys one and alloy two in the ratio of 3:4. Find the percentage of gold in the mixture

79 2/7%

71 2/7%

73 2/7%

71 3/7%

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Explanation:

Platinum = 1/3 and 1/4
gold = 2/3 and 3/4
Alloy one and two are mixed in the ratio of 3:4, so ratio of platinum and gold in final ratio – 2:5
So gold % = (5/7)*100 = 71 3/7%