Question
The ratio of two numbers is 5:8. If 9 is added to each, the ratio becomes 2:3. What is the smaller number?
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Correct Answer: C. 45
Explanation:
Let the numbers be 5k and 8k; then (5k + 9)/(8k + 9) = 2/3.
Solving gives k = 9, so the smaller number is 45.
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