The average age of 24 students in a classis 10,if the teachers age is included , the average increase by one .what is the age of teacher
- 30
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- 75
- 29
Explanation
Average = sum of all values/total number of values
Sum of all values = total numb of values x Average
=24*10=240
=25*11=275
Age of teacher=275-240=35
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