The average salary per head of all the workers of an office is Rs 80. The average salary of 20 officer is Rs 525 and the average salary of the rest is Rs 70. Find the total numbers of workers?

Explanation

Let total no. of workers = x Total salary = x × 80 ------ (i) . c o e e As per the question, Total salary = 20 × 525 + (x – 20) × 70 ------- (ii) From (i) & (ii), ⇒ x × 80 = 20 × 525 + (x – 20) × 70 ⇒ 80x – 70x = 10500 – 1400 ⇒ 10x = 9100 ⇒ x = 910