The average weight of 6 boys gets increased by 5kg if a boy with weight 20kg is
replaced by a new boy. What is the weight of new boy?
(a) 41 kg
(b) 50 kg
(c) 65 kg
(d) 49 kg
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Answer:
41 kg
because :
6x + 5kg = 20 kg
6x = 20 - 5 (kg)
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