railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Average

The average weight of a ring is 10 gm which contains gold and copper in the ratio of 9.5 : 0.5. What would be the weight of copper in the ring weighing 8 grams if the same ratio is to be maintained?

1
0.5 gm
2
0.4 gm
3
0.3 gm
4
3.5 gm
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