In two types of brass, the ratios of Copper to Zinc are 8 : 3 and 15 : 7 respectively. If the two types of brass be melted and mixed in the ratio 5 : 2 a new type of brass is obtained. The ratio of Copper and Zinc in this new type of brass is?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 5 : 2
Ratio of copper and
zinc in new mixture = (8/11 × 5 + 15/22 × 2)/(3/11 × 5 + 7/22 × 2)
= (110/22)/(44/22) = 5/2