X and Y are the two alloys which were made by mixing Zinc and Copper in the ratio 6 : 9 and 7 : 11 respectively. If 40 grams of alloy X and 60 grams of alloy Y are melted and mixed to form another alloy Z, what is the ratio of Zinc and Copper in the new alloy Z?
Explanation:
Zinc in alloy Z = 40 × 615 + 60 × 718
= 1183
Copper in alloy Z = 40 × 915 + 60 × 1118
= 1823
Ratio of Zinc and Copper in Z = 118 : 182 = 59 : 91
Hence, option (b).
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