A class has 30 boys and 20 girls. The mean weight of boys of the class is 50kg and the mean weight
of girls of the class is 40kg. Find the mean weight of the total students of the class
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A class has 30 boys and 20 girls. The mean weight of boys of the class is 50kg and the mean weight
of girls of the class is 40kg. Find the mean weight of the total students of the class
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the weight of the class is 90kg
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