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The mean weight of 150 students in a certain class is 60kg. The mean weight of boys in the class is 70kg and that of girls if 55kg, then number of boys and girls respectively are |
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Answer» The mean weight of 150 students in a certain class is 60kg. The mean weight of boys in the class is 70kg and that of girls if 55kg, then number of boys and girls respectively are |
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