the mean wieght of 16 students of a school is 40kg. If a student weighting 25kg leaves the school,find the mean weight of the remaining students.
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Let the sum of weights of 16 students = s Kg
We know that mean = 40 Kg
Therefore, s/16 = 40
s = 16*40 = 640
Now, One student left the school whose weight was 25 kg
Total weight of remaining students = s-25 = 640-25 = 615 Kg
mean weight of remaining students = (sum of weights of remaining students)/(number of students remaining)
= 615/15 = 41 Kg
We know that mean = 40 Kg
Therefore, s/16 = 40
s = 16*40 = 640
Now, One student left the school whose weight was 25 kg
Total weight of remaining students = s-25 = 640-25 = 615 Kg
mean weight of remaining students = (sum of weights of remaining students)/(number of students remaining)
= 615/15 = 41 Kg
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