The average age of 14 students and their teacher is 18 years. If the teacher's age is excluded, the average reduces by 1 year. What is the teacher's age?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 32.
Total age of 14 students and their teacher = 15 × 18 = 270
Total age of 14 students = 14 × 17 = 238
So, age of teacher = 270 - 238 = 32 years