SOLUTION: average age of 25 students is 17 years. If we add the age of teacher also, average age increase by one year. The age of a teacher in years is?

Question 1024248: average age of 25 students is 17 years. If we add the age of teacher also, average age increase by one year. The age of a teacher in years is?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
In words:
[ average of ages ] = [ total of ages ] / [ number of individuals ]
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Let = total of ages
Average for just the students:

The student's ages total
-----------------------------
Let = the teacher's age
Add in the teacher to same formula:

The teacher is 43
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check answer:

OK
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