1. The average weight of 87 Notebooks in a box is 8.7 kg. When a new Notebook is added to the box the average goes to 8.8 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 87 Notebooks in a box = 8.7 kg => Total weight = $$87 imes8.7=756.9$$ kg Let weight of new book = $$x$$ kg => New average = $$frac{756.9+x}{88}=8.8$$ => $$756.9+x=88 imes8.8=774.4$$ => $$x=774.4-756.9=17.5$$ kg => Ans - (C)
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