Question

average weight of 10 men is decreased by 3 kg when one of the most weight is 80 kg is replaced by a new person the weight of the person is
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Answer 1

Answer:

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Let  = weight of 9 men

Let  = weight of the man replacing the 10th man

given:



Multiply both sides by 



Subtract  from both sides



The new man weighs 50 kg