Following are the weights( in kg) of 8 students of a class 48.5,50,44.5,49.5,50.5,45,51,43 what will be the mean weight if a student, whose weight is 62 kg is also included?
Answers
Answer:
add all the 8 students'weights and also add 62 kg to it.
then divide the total by 9.
you get the mean weight
=(48.5+50+44.5+49.5+50.5+45+51+43+62)/9
=444/9
= 49.333...
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hope it helps
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Mean of the weights = 49.333 kg
Given:
The weights (in kg) of 8 students of a class are
48.5, 50, 44.5, 49.5, 50.5, 45, 51, 43
To find:
The mean weight
Solution:
Given data 48.5, 50, 44.5, 49.5, 50.5, 45, 51, 43
As we know the formula for mean is given by
Mean = Sum of observations/ number of observations
From given data,
Sum of observations = 48.5+ 50+ 44.5+ 49.5+ 50.5+ 45+ 51+ 43 = 382
Number of observations = 8
Mean of the 8 weights = 382/8 = 47.75 kgs
Given that a student, whose weight is 62 kg is also included
Then sum of the weights = 382+62 = 444 kg
Number of observations = 9
Mean of the new data =444/9 = 49.333 kg
Mean of the weights = 49.333 kg
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