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Question

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 :


Options:
A .  45 kg
B .  50 kg
C .  53 kg
D .  55 kg
Answer: Option A

Weight of the teacher = (35.4 x 25 - 35 x 24)kg = 45kg.


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