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The average weight of a class of 40 students is 40 kg. If the weight of the teacher be included , the average weight increases by 500 gm . The weight of the teacher is?

40.5 kg
60 kg
60.5 kg
62 kg

Correct Answer: 60.5 kg

Explanation:

Weight of the teacher = Total weight of 40 students and teacher - total weight of 40 students
= 41 x 40.5 - 40 x 40 kg
= 60.5kg

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