The average age of 36 students in a group is 14 years. When teacher's age is included to it, the average increases by one. What is the teacher's age in years ?
A) 35 years
B) 45 years
C) 51 years
D) 54 years
Answer: C) 51 years
Explanation:
Age of the teacher = (37 * 15 - 36 * 14) years = 51 years.
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