The average age of 30 students in a class is 16 years. If the age of their teacher is 47 years. What is the average age of the students and the teacher combined?
Answers
ans-17
30student average age=16years
age of all students 30×16=480
age of Their teacher=47
combine students and teacher age=480+47=527
average=527/31
=17.
The average age of the students and the teacher combined is 17 years.
Given:
The average age of 30 students is 16 years.
The age of their teacher is 47 years.
To Find:
We have to find the average age of the students and the teacher combined.
Solution:
As the average age of 30 students is 16 years,
therefore, sum of the age of those 30 students = 30 × 16 years
= 480 years
Now, if the age of their teacher is combined with their age,
Then the sum of the age of 31 persons = 480+47=527 years
Therefore, the average of their age is 527÷31=17 years
Hence, the average age of the students and the teacher combined is 17 years.
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