83
The average age of 27 students of a class is 22. If the age of the teacher is also added to their ages, then the average increases by one. Find the age of the teacher -
- A42
- B48
- C50
- D52
Answer not set
Discussion 1
Log in or create a free account to reply and vote.
0
CCommunity
Sum of ages of 27 students of a class = 27× 22 = 594
The average age of 27 students of a class and a teacher = 22 + 1 = 23
Sum ofages of 27 students of a class and a teacher = 23 × 28 = 644
Age of the teacher = 644 – 594 = 50
∴ Age of the teacher = 50
The average age of 27 students of a class and a teacher = 22 + 1 = 23
Sum ofages of 27 students of a class and a teacher = 23 × 28 = 644
Age of the teacher = 644 – 594 = 50
∴ Age of the teacher = 50