Question
The average weight of 20 students of a class was 30.5
kg. After 6 new students joined the class, its average weight increased by 2 kg. Find the average weight of the 6 new students who joined the class (rounded off to one decimal place).Solution
Total weight of original 20 students = 20 × 30.5 = 610 kg New average weight = 32.5 kg Total weight of 26 students = 26 × 32.5 = 845 kg Weight of new students = 845 - 610 = 235 kg Average weight of 6 new students = 235 ÷ 6 = 39.2 kg The average weight of the 6 new students is 39.2 kg.
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