Question

the average of 5 teacher is 28 years.if one teacher is excluded the mean gets reduced by 2 years.the age of excluded teacher is

Answer 1

Solution : Age of excluded age is 36 years.


Step by step explanation :

Given Average of 5 teachers = 28 .

We know that

Average = Sum of observations / Number of observations

Sum of their ages = 28 * 5 = 140 .

If one teacher is excluded, then mean gets reduced by 2 years.

So, Sum of teachers age excluding one teacher = ( 28 - 2 ) * 4 = 26 * 4 = 104 .

Therefore, The age of excluded teacher is 140 - 104 = 36 years

Hope you are helped!