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What is the present age of the son? Statement I: The son's age is one-third of his father's age, and the father is 45 years old. Statement II: The son is 20 years younger than his father, who is 35 years old.

Competition practiceData Sufficiency
  • AEither statement alone is sufficient
  • BStatement II alone is sufficient but Statement I alone is not
  • CBoth statements together are needed (neither alone is sufficient)
  • DStatement I alone is sufficient but Statement II alone is not

Step-by-Step Solution

I gives son = 45/3 = 15 years; II gives son = 35 - 20 = 15 years. Each statement alone fixes the age at 15.
Answer: A) Either statement alone is sufficient

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