Question

The average of monthly salary of fifteen employees in a company is Rs. 9450.

Answer 1

Mean salary of 15 employees = Rs 9450
Sum of salaries of 15 employees = 15$\times$9450 = Rs 141750
If the salary of the supervisor is included, the mean salary increases by Rs 650.
New mean = 9450 + 650 = Rs 10100
Sum of the salaries of 15 employees and the salary of the supervisor = 16$\times$10100= Rs 161600
∴ Supervisor's salary = $161600-141750=\mathrm{Rs}19850$