The mean weight of 34 students of a school is 42 kg. If the weight of the teache

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The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg.)

Options:

A . 55 kg

B . 57 kg

C . 66 kg

D . 56 kg

Answer: Option D

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