Mathematics, 06.08.2019 22:30 hayleyconsole

The mean weight of 60 students of a class is 40kg. the mean weight of boys is 50kg, while that of the girls is 30kg. find the no. of boys n girls in the school.

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The mean weight of 60 students of a class is 40kg. the mean weight of boys is 50kg, while that of th...