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40% of the employees in a factory are workers. All the remai

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40% of the employees in a factory are workers. All the remai [#permalink] New post 11 Apr 2019, 16:26
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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
[Reveal] Spoiler: OA

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Re: 40% of the employees in a factory are workers. All the remai [#permalink] New post 11 Apr 2019, 20:26
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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 = \((\frac{40}{100})* 390 + (\frac{60}{100})*420 = 156 + 252 = 408\)
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Re: 40% of the employees in a factory are workers. All the remai   [#permalink] 11 Apr 2019, 20:26
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