The average salary of all the staff in an office of a corporate house is $Rs.\, 5,000$. The average salary of the officers is $Rs.\,14,000$ and that of the rest is $Rs.\,4,000.$ If the total number of staff is $500,$ the number of officers ?
The average salary of all the staff in an office of a corporate house is $Rs.\, 5,000$. The average salary of the officers is $Rs.\,14,000$ and that of the rest is $Rs.\,4,000.$ If the total number of staff is $500,$ the number of officers ?
- A
$10$
- B
$15$
- C
$25$
- D
$50$
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