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Railways PYQCBT 1 2016

RRB NTPC · Question 27

The average ages of parents and two children are 30 years and 8 years respectively. The average age of the family is A. 16 years B. 19 years C. 18 years D. 17 years

  1. A

  2. B

  3. D

  4. C

Show answer & explanation

Answer: (B) B

Explanation

The two parents' ages total 2 × 30 = 60 and the two children's total 2 × 8 = 16. The family of four totals 76 years, so the average = 76/4 = 19 years.