Question
The average weight of 14 students of a class is 20 kg.
If a student leaves the class, the average weight of the class drops by 2 kg. Find the weight of the student (in kg) who left the class.Solution
Average weight of 14 students =20kg. Total weight =20Ă—14=280kg. After a student leaves a class then average =20-2 =18kg Total weight of 13 student =13Ă—18=234 kg. Weight of a student who left the class =280-234=46 kg.
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