Question

The mean weight of 25 students of a class is 52. If the mean of first 13 students is 48 kg and that of last 13 students is 55 kg. Find the weight of 13 students.

Answer 1

sum of weight of 25 students = 25*52 =1300kg
" " ". first 13 students = 48*13=624 kg
last 13 students=55*13=715kg
weight of 13 students=1339-1300=39 kg

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Answer 2

Hi there!

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What is Mean?

The average of a given set of numbers is called the Arithmetic mean, or simply the mean, of the given numbers.

Mean = $\frac{Sum \: of \: observations }{Number \: of \: observations }$

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For your solution to the given question refer to the attachment.

Thanks for the question!

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