The mean weight of 36 students is 41 kg. If one of the student is excluded then the mean is decreases by 200g. Find the weight of student excluded
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Mean weight of the class = 41 Kg
Number of students in the class = 36
∴Total weight of the students of the class = 41×36 = 1476 Kg
Now, 1 student excluded in the class.
Number of students in the class = 35
Mean weight of the class = 41Kg - 0.2 Kg = 40.8 Kg
∴Total weight of the students of the class = 40.8×35 = 1428 Kg
Therefore, weight of the student who excluded in the class = 1476 Kg - 1428 Kg = 48 Kg
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