Question
The combined average weight of 8 copies and 5 books is
150 grams. If the average weight of the copies is 180 grams, find the average weight of the books.Solution
Total weight of 8 copies and 5 books = 13×150 = 1950 Weight of 8 copies = 8×180 = 1440 Weight of 5 books = 1950 – 1440 = 510 Average weight of 5 books = 510/5 = 102 grams
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