Multiple choice

The average salary of 30 officers in a firm is Rs. 120 and the average salary of laborers is Rs. 40. Find the total number of employees, if the average salary of the firm is Rs. 50.

  1. 210

  2. 240

  3. 220

  4. 390

  5. 83

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let the total number of laborers be x. (120*30 + 40*x)/(30 + x) = 50; x = 210. Hence, total number of employees is 210 + 30 = 240.