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. Find out the teacher's age in years?
average age of 36 students in a group is 14
=> Sum of the ages of 36 students = 36×14
When teacher's age is included to it, the average increases by one => average = 15
=> Sum of the ages of 36 students and the teacher =37×15
Hence teachers age = 37×15−36×14=37×15−14(37−1)
=37×15−37×14+14 = 37(15−14)+14 =37+14 =51
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