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The mean weight of a class of 36 students is 41kg. If one of the students leaves the class then the mean is decreased by 200g. Find the weight of the student who left. |
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Answer» It is given that Mean weight of 36 students = 41kg So the total weight = 41 (36) = 1476kg It is given that if one of the students leaves the class then the mean is decreased by 200g So the new mean = 41 – 0.2 = 40.8kg We get the total weight of 35 students = 40.8 (35) = 1428kg So the weight of student who left = total weight of 36 students – weight of 35 students By substituting the values Weight of the student who left the class = 1476 – 1428 = 48kg Therefore, the weight of the student who left is 48kg. |
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