Question

the average salary of teachers of high school is Rs 3000 when salary of two more teachers is included the average salary Deuce by Rs 100 and the total salary increase by Rs 4000 now find the number of teacher​

Answer 1

There would be 18 teachers

Step-by-step explanation:

Let x be the original number of teachers,

If average salary of the teachers = rs 3000,

Then total salary = number × average = 3000x,

After reducing the average salary by rs 100,

New average salary = 3000 - 100 = 2900,

If number of teachers is increased by 2,

New number of teachers = x + 2

So, total new salary = 2900(x+2)

According to the question,

2900(x+2) - 3000x = 4000

2900x + 5800 - 3000x = 4000

-100x + 5800 = 4000

-100x = 4000 - 5800

-100x = -1800

$\implies x =\frac{-1800}{-100}=18$

Hence, there were 18 teachers.

#Learn more:

The average salary of 15 teachers is rs 4500 per month. three teachers left the school and the average salary of the remaining teachers dropped by rs 175. find the total salary of the teachers who left the school.

https://brainly.in/question/1325412