The mean salary of 20 workers is Rs 12,500. If the salary of office superintendent is added, the mean will increase by Rs 250. Find the salary of the office superintendent.

The mean salary of 20 workers is Rs 10,250, If the salary of office superintendent is added, the mean will increase by Rs 750. Find the salary of the office superintendent.

The mean salary of 20 workers is Rs. 10,250. If the salary of office superintendent is added,the mean will increase by Rs. 750. Find the salary of the office superintendent.

The average of monthly alary of 20 employees in a company is Rs. 7650. If the manager salary is added, the average salary increases by Rs. 550 per month. What is the manager monthly salary?

The mean of nine numbers is 77. If one more number is added to it then the mean increases by 5. Find the number added in the data.

Choose the correct atternative answer for each of the following question: The mean of 10 numbers is 45. If one more is added to it the mean increases by 2. Find the number.