A family consists of two grandparents, two parents, and three grandchildren. The average age of the grandparents is 64 years, the average age of the parents is 39 years, and the average age of the grandchildren is 6 years. What is the average age (in years) of the family? Choose the correct choice:
A) 31
B) 32
C) 33
D) 34
E) 35
Total age of the grandparents = 64 Ã— 2 = 128   Total age of the parents = 39 Ã— 2 = 78   Total age of the grandchildren = 6 Ã— 3 = 18   Average age of the family = (128+78+18)/7 = 224/7= 
<gadget id="calculator">224/7</gadget>
<output>32</output>
32 years   The answer is 32.
<result>B</result>
A family consists of two grandparents, two parents, and three grandchildren. The average age of the grandparents is 64 years, the average age of the parents is 39 years, and the average age of the grandchildren is 6 years. What is the average age (in years) of the family?