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A father is three times as old as his son. After 12 years, the father will be twice as old as his son. Find the present age of the son. (answer in years)

Competition practiceAverages & Ages
  • A10
  • B14
  • C15
  • D12

Step-by-Step Solution

Let son = s, father = 3s. Then 3s + 12 = 2(s + 12) ⇒ 3s + 12 = 2s + 24 ⇒ s = 12.
Answer: D) 12

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