hard · GMAT Quant
An alloy contains copper and tin in the ratio 9:4. After 2.5 kilograms of tin are added, the ratio of copper to tin becomes 2:1.
What was the original weight of the alloy, in kilograms?
- 65
- 45
- 52
- 32.5
- 20
Sign up free to see the explanation and track your rank →
More GMAT Quant practice
- Which of the following values is the largest?
- Which property of arithmetic justifies that first step?
- How many unique meal combinations can a customer create?
- What is the final price of the jacket?
- What is the actual distance between them?
- Which of the following must also be an even integer?
- What is the speed of the current?
- Including both endpoints, how many distinct integer price points are in this range?