A metal bar weighing 20 kilograms, consisting of tin and silver, has lost 2 kilograms of its weight when placed in water. If 10 kilograms of tin lose 1.375 kilograms in water and 5 kilograms of silver lose 0.375 kilograms in water, what is the proportion of tin to silver in the bar?

Correct answer marked below

1/4

2/5

1/2

3/5

2/3

Correct

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What this question tests

Your ability to reason about weighted averages and the composition of mixtures.

Averaging the percentages of two solutions without weighting by their volumes.