engineering recuitment NMC JE Civil Mock Test 2024 Quantitative Aptitude Mixture Problems

An alloy X contains by weight copper and tin in the ratio 7 : 3 and alloy Y contain copper and tin in the ratio 3 : 2. X and Y are taken in the ratio 4 : 1 and melted to form alloy Z. The percentage of copper in alloy Z is:

1

70

2

56

3

65

4

68

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