If an alloy contains copper and silver in the ratio 3:7, then the percentage quantity of silver to the alloy is?
Answer: 70%
Explanation
The ratio of copper to silver is 3:7.
To find the percentage of silver in the alloy, we can use the following formula:
Percentage of silver = (Amount of silver / Total amount) × 100
First, let's find the total amount:
Total amount = Copper + Silver
= 3 + 7
= 10
Now, we can plug in the values:
Percentage of silver = (7 / 10) × 100 = 70%
So, the percentage quantity of silver in the alloy is 70%.
The correct answer is: 70%
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