Carcass wrote:
40% of the employees in a factory are workers. All the remaining employees are executives. The annual income of each worker is $390. The annual income of each executive is $420. What is the average annual income of all the employees in the factory together?
(A) 390
(B) 405
(C) 408
(D) 415
(E) 420
Explanation::
Let the total employee be = 100
40% of the employee are worker = 40
hence the number of executive = 60
Av. income of all the employees = \((\frac{40}{100})* 390 + (\frac{60}{100})*420 = 156 + 252 = 408\)