Question
The average weight of 10 books is 5 kg. If 6 new books
are added, the new average increases by 3 kg. What will be the average weight of the 6 new books?Solution
Total books = 10 + 6 = 16 books Increment in average = 5 + 3 = 8 kg Now, Weight of 18 new books = (16 × 8) – (10 × 5) = 78 kg ∴ Required average = 78/6 = 13 kg
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