Question

the average of 50 students of a class is 13.5 years the average age along with the teacher is 14 year what is the age of the teacher​

Answer 1

Answer:

Sum of observations(without teacher)=13.5*50=675

Sum of observations with teacher=14*51= 714

Age of teacher= 714-675= 39

Answer 2

Answer:

39 years

Step-by-step explanation:

Average = 13.5

Sum of ages = 13.5*50

Sum of ages = 675 years

Now, when we include the teacher the average is 14 years.

So, New Sum of ages = 14*51

New Sum of ages = 714 years

Age of teacher = New Sum - Old Sum

Age of teacher = 714-675

Age of teacher = 39 years.