Answer : 3 9 : 10 Explanation : Answer: C) 9 : 10 Explanation: The ratio of X and Y ages at present is 4:5. Then, the ratio 20 years ago will not be more than the ratio at present.So, from the options 9:10 is not satifying =

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The ratio of present ages of X and Y is 4:5. Which of the following can