The average age of 6 children and their father is 13 years, and this average is reduced by 4 years if the father is excluded. How old is the father?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e 37 years.
Total age of 6 children + father = 13 × 7 = 91 years
Average age of 6 children = 13 - 4 = 9
Total age of 6 children = 9 × 6 = 54 years
Father's age = 91 - 54 = 37