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Quantitative Aptitude

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Question

The average weight of 8 staff is increased by 3kg when one of them whose weight is 50kg is replaced by a new staff. The weight of the new staff is

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Solution

Total average weight increased is $3$ Kg
Total weight increased is $8 \times 3 = 24$ Kg
The weight of new staff thus is $50 + 24 = 74$ Kg

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