The average age of 35 students in a class is 16 years. The average age of 21 students is 14. What is the average age of the remaining 14 students?
Note
The average age of 35 students is 16
The average age of 21 students is 14
∴ Average age of remaining 14 students = {(35×16)−(21×14)}/14
= (5 × 8) - 21
= (40 - 21)
= 19 years