Question
A father is now three times did as his son. Five years back, he was four
times as old as his son. The age of the son is
Answer: Option B
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Let sons age be x. Then, father's age is3x .
Five years ago, father's age = 3x - 5 and son's age = x - 5.
So, 3x - 5 = 4(x - 5) or 3x - 5 = 4x - 20 or x = 15.
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