The average age of a family of four members is 26 years. If the youngest member is 14 years old, what is the average age of the remaining members?

Question: The average age of a family of four members is 26 years. If the youngest member is 14 years old, what is the average age of the remaining members?

Solution:
Total age of all 4 members = 4 × 26 = 104 years
Youngest member's age = 14 years
Remaining total age = 104 - 14 = 90
Average age of 3 remaining = 90 ÷ 3 = 30 years