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 **