the average weight of 21 boys was recorded as 64kg. if the weight of the teach

Question

the average weight of 21 boys was recorded as 64kg. if the weight of the teacher was added, the average increased by one kg. what was the teacher's weight?

Options:

A . 80 kg

B . 82 kg

C . 84 kg

D . 86 kg

Answer: Option D
Explanation :

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