The average weight of a class of 24 students is 35 kg. If the weight of the teac

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The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is : 

A. 45 kg
B. 46 kg
C. 47 kg
D. 48 kg

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