Mathematics · Average
The average weight of 99 notebooks kept in a box is 9.9 kg. After adding 1 more notebook to the box, the average weight becomes 10 kg. Find the weight of the new notebook.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 119.5 kg
- 218.7 kg
- 319.9 kg✓
- 419.1 kg
Correct answer
19.9 kg
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