there n number of students in a lift. Their average weight is 39 kg. If two students weighing 37 kg and 41 kg enter the lift, and one student whose: is more than 30 kg leaves
‘weight of the group increases by 2 kg. If the initial number of students in the group is an odd number, what could be the Weight of students who left the group
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Answer:
Total weight of 24 students =24×35=840kg
Total weight of 25 persons with teacher =25×35.4=885kg.
∴ Weight of teacher =(885−840)kg=45kg
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