Correct Answer - Option 3 : Rs. 4000
Given:
Average salary of 20 workers = Rs. 1900
Average salary of 20 workers and 1 manager = Rs. 2000
Formula used:
Total salary = Average salary × Number of persons
Calculation:
Total salary of 20 workers = 20 × Rs. 1900
⇒ Rs. 38,000
Total salary of 20 workers and 1 manager = Rs. 21 × 2000
⇒ Rs. 42,000
Salary of manager = Rs. 42,000 – Rs. 38,000
⇒ Rs. 4000
∴ The salary of manager is Rs. 4000