The average of monthly salary of 20 employees in a company is Rs. 7, 650. If the manager's salary is added, the average salary increases by Rs. 550 per month. What is the manager's monthly salary?

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Solution

Mean salary of 20 employees = Rs 7650
∴ Sum of the salaries of 20 employees = 20 $\times$ 7650 = Rs 153000
It is given that if the salary of the manger is included, then the mean is increased by Rs 550.
∴ New mean = 7650 + 550 = Rs 8200
Now,
Sum of the salaries of 21 employees = 21 $\times$ 8200 = Rs 172200
And,
Salary of the manager = $172200 - 153000 = Rs 19200$

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