1. The average weight of 93 Notebook in a box is 9.3 kg. When a new Notebook is added to the box the average goes to 9.4 kg. Find the weight of the new Notebook.(in kg)
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By: anil on 05 May 2019 01.12 am
Average weight of 93 Notebooks in a box = 9.3 kg => Total weight = $$93 imes9.3=864.9$$ kg Let weight of new book = $$x$$ kg => New average = $$frac{864.9+x}{94}=9.4$$ => $$864.9+x=94 imes9.4=883.6$$ => $$x=883.6-864.9=18.7$$ kg => Ans - (A)
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