Question

the average salary of the entire staff in an office is Rs 3200 per month. the average salary of officers is Rs 6800 and that of non officers is Rs 2000 . if the number of officer is 5 then find the number of non officers in the office?​

Answer 1

Answer:

Number of non officers =15

Step-by-step explanation:

Let, number of non officers be x .

According to the question,

(x+5)*3200= 6800*5 + 2000*x

or, 3200x +16000= 34000+2000x

or, 3200x - 2000x = 34000- 16000 = 18000

or, 1200x = 18000

or, x = (18000/1200)= 15

therefore, x=15

Answer 2

Given :  average salary of the entire staff in an office is Rs 3200 per month. the average salary of officers is Rs 6800 and that of non officers is Rs 2000  

the number of officer is 5  

To find :   the number of non officers in the office

Solution:

number of officer is 5  

average salary of officers is Rs 6800

Total Salary of officers = 5 * 6800 = 34000 Rs

Let say  number of non officers = X

average salary of non officers is Rs 2000

Total Salary of non officers = X * 2000 = 2000X Rs

Total Salary  of   entire staff = 34000 + 2000X Rs

average salary of the entire staff =  Rs 3200

number of entire staff  = 5 + X

Total Salary  of   entire staff  = (5 + X) 3200

= 16000 + 3200X

Equate total salary

16000 + 3200X = 34000 + 2000X

=> 1200X  = 18000

=> 12X = 180

=> X = 15

number of non officers in the office  = 15

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