An alloy of gold,silverand bronze contain 90% bronze, 7% gold and 3% silver. A second alloy of bronze and silver only is melted with the first and mixture contain 85% of bronze, 5% of gold, 10% of silver find the percentage of bronze in second alloy?

Correct answer marked below

75%

72.5%

Correct

70%

67.5%

60%

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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.