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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 Rs. 390. The annual income of each executive is Rs. 420. What is the average annual income of all the employees in the factory together?
**

A. 390
B. 405
C. 408
D. 415

A. 390 B. 405 C. 408 D. 415