The overall average salary for all employees in an office is ₹16,000. Officers earn an average salary of ₹28,000, while non-officers make an average of ₹10,000. There are 15 officers. Determine the number of non-officers.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 30.
Let the number of non-officers = x
Total employees = 15 + x
Total salary = 16000(15 + x)
Salary of officers = 28000 × 15 = 420000
Salary of non-officers = 10000x
⇒ 16000(15 + x) = 420000 + 10000x
⇒ 240000 + 16000x = 420000 + 10000x
⇒ 6000x = 180000
⇒ x = 30
Number of non-officers = 30