In a factory, the average salary of the employees is Rs 7000. If there are 12 officers whose average salary is Rs 40000 and the average salary of the remaining employees is Rs 6000, then the total number of employees is:
A402
B404
C406
D408 ✓ Correct
Correct answer: (D) 408
Explanation
The factory has 408 employees in all.
Let total be N; overall pay = 7000 x N.
12 officers give 12 x 40000 and the rest give 6000 x (N - 12).
7000N = 480000 + 6000(N - 12) = 408000 + 6000N.
1000N = 408000, so N = 408.
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