The average age of 30 students in a class is 15 years. If the teacher’s age is included, the average increases by 1 year. What is the teacher’s age?
A44 years
B46 years
C48 years
D50 years
Explanation
Total age of 30 students = 30 * 15 = 450. Total age of 31 people = 31 * 16 = 496. Teacher’s age = 496 – 450 = 46 years.
Exam Relevance
- Topic: Averages
- Subtopic: Inclusion Problems
No Comments