Question

The average salary of entire staff is 120 rupees per month the average salary of officers is 460 rupees and that of non officers is 110 rupees if no of officers is 15 then find the number of non officers in the office​

Answer 1

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Answer 2

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answer: Let number of non-officers = a,

Then Total salary of officers = 15 × 460 = 6900,

Total salary of non-officers = a × 110.

Total salary of all employees = 120 × (15 +a)

Then,

Salary of all employees = Salary of officers + Salary of non-officers

120 × (15 + a) = 15 × 460  +  110a

1800 + 120a = 6900 + 110a

120a – 110a = 6900 – 1800

10a = 5100

a = 510

Hence, number of non-officers = 510