Correct Answer - Option 3 : 1032
Given:
The average salary per head of all the employees of an institution = 60 Rs.
The average salary of 12 officers = 400 Rs.
The average salary per head of the rest = 56 Rs.
Calculation:
Let the total number of employees = y
According to the given,
⇒ 12 × 400 + (y - 12) × 56 = 60y
⇒ 4800 + 56y - 672 = 60y
⇒ 4128 = 4y
⇒ y = 4128/4
⇒ y =1032
∴ The total number of employees in the institution is 1032