The average salary, per head, of all the workers of an institution is Rs. 60. The average salary of 12 officers is Rs. 400; the average salary, per head, of the rest is Rs. 56. The total number of workers in the institution is -

Answer: Option C

Let the total number of worker = x
According to the question,
⇒ 12 × 400 + (x - 12) × 56 = 60x
⇒ 4800 + 56x - 672 = 60x
⇒ 4128 = 4x
⇒ x = $$\frac{4128}{4}$$
= x = 1032