A family consists of two grandparents, three parents and four grandchildren. The average age of the grandparents is 65 years, that of the parents is 32 years and that of the grand children is 8 years. What is the average age of the family?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 28 2/3 Years
Average = sum of terms / total terms
A/C to question, The average age of the grandparents is 65 years
65 = sum of age of grand parents/2, sum of age of grandparents = 130
Average age of the parents is 32 years
sum of age of parents = 32 × 3 = 96
Average age of grandchildren is 8 years
sum of age of grandchildren = 8 × 4 = 32
average age of the family = (130 + 96 + 32)/9
258/9 = 28 2/3 Years.