Practicing Success
A family consists of two grandparents, two parents and four grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 9 years. What is the average age of the family? |
40 years 30 years 36 years 45 years |
30 years |
ATQ, Sum of grandparent's age = 134 Sum of parent's age = 70 Sum of grandchildren's age = 36 Average age of the family = \(\frac{134 + 70 + 36}{8}\) = 30 years |