Arithmetic mean of earning of 42 workers in a factory is...

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Arithmetic mean of earning of 42 workers in a factory is Rs. 1200 per month. On account of price rise the workers managed to get 10% hike in their earnings. In addition to this, the management paid Rs. 100 per month to each employee as bonus. The arithmetic mean of total earning of the workers after these changes will be

A. Rs. 1300

B. Rs. 1320

C. Rs. 1420

D. Rs. 1510

Answer: Option C

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