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The average salary of 20 workers in an office id Rs. 1900 per month . If the manger's salary is added , the average salary become Rs. 2000 p.m what is the manager's annual salary?

Rs. 24000
Rs. 25200
Rs. 45600
None of these

Correct Answer: None of these

Explanation:

Manager's salary per month
= Rs. ( 21 x 2000 - 20 x 1900 )
= Rs. 4000
∴ Manager 's annual salary
= Rs. (4000 X 12 ) = Rs. 48000.

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