Question

The mean age of 15 teachers of a school 32 year. 1 new teacher aged 28 years joins the school. find the new mean age of 16 teachers of the schoo.l

Answer 1

Answer:the mean of 16 teachers is 31.75

Step-by-step explanation:

Answer 2

Given:

Average or mean age of fifteen teachers is 32 years.

The age of the new teacher is 28 years.

To find :

The average age of sixteen teachers.

Solution:

We know that,

Average = $\frac{Sum of terms }{total number of terms}$

Here mean or average = 32 years

The total number of teachers initially = 15

The sum of ages of all teachers = 32 × 15 = 480

Now, one more teacher joins the school. The age of the new teacher is 28 years.

Final sum of ages of 16 teachers = 480 + 28 = 508

Total number of teachers now = 16

New mean or average = 508 / 16 = 31.75

The new average or mean age of sixteen teachers is 31.75.