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Question 17
Ages of a brother and sister are in the ratio 4 : 3. After 3 years, the sister will be twice as old as she is now. How old is the brother now?
Solution
Let say, Brother's age is 4k and Sister's age is 3k.
According to question,
$$6k=3k+3$$
or, $$k=1.$$
So, Brother is 4 year old.
A is correct choice.
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