A class of 15 students has an average age of 13 years. When the class teacher's age is added, the average rises to 14 years. How old is the teacher (in years)?

Question

Accepted Answer

29. Total of students = 15 × 13 = 195. Total with teacher = 16 × 14 = 224. Teacher = 224 − 195 = 29 years.

A class of 15 students has an average age of 13 years. When the class teacher's age is added, the average rises to 14 years. How old is the teacher (in years)?

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