The average weight of the students of a class is 60 kg. If eight new students of average weight 64 kg join the class, the average weight of the entire class becomes 62 kg. How many students were there in the class initially ?
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8 members
total new weight - old weight
assume intial students x
62(x+8) - 60(x) =64(8)
2x=16
x=8
intially there were 8 students
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