Multiple choice

A family has four people – father, mother, son and daughter. When the son's age doubles, the average age of the family becomes 2 years more than the average age of the family when the daughter's age doubles. Which of the following is true?

  1. The son is 4 years elder to the daughter.

  2. The daughter is 4 years elder to the son.

  3. The son is 2 years elder to the daughter.

  4. The daughter is 2 years elder to the son.

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C Correct answer