Question

The average monthly salary of 20 workers in an office is Rs. 45900. If the manager's salary is added, the average salary becomes Rs. 49200 per month. What's manager's monthly salary?

Answer 1

Average monthly salary of 20 workers = Rs 45900

Sum of the monthly salaries of 20 workers = Rs 45900$\times$ 20=Rs 918000

By adding the manager's monthly salary, we get:

Average salary = Rs 49200

Now,

Let the manager's monthly salary be Rs x.

Thus, we have:

$\frac{\text{Sum of the monthly salaries of 20 workers}+x}{21}=49200\Rightarrow \frac{918000+x}{21}=49200\Rightarrow 918000+x=1033200\Rightarrow x=115200$

Therefore, the manager's monthly salary is Rs 115200.