Question

Average age of 15 students of a IUB class is 11 years. If the teacher is also included the average age becomes 13 years. How old is the teachers?

Answer 1

Answer:

THE TEACHER'S AGE IS 43

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Answer 2

Step-by-step explanation:

average=11

n=15

=>11=X/15

=>X = 11×15= 165

now,

n=16

average=13

=>13=X/16

=>X=13×16=208

therefore, the age of the teacher=208-165=43