the mean weight of 34 students of a school is 42 kg. if the weight of the teac

Question

the mean weight of 34 students of a school is 42 kg. if the weight of the teacher be included the mean rises by 400g. find the weight of the teacher?

Options:

A . 55 kg

B . 56 kg

C . 57 kg

D . 58 kg

Answer: Option B
Explanation :

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