The average weight of a group of girls is 20 kg less than that of a group of boys. If the number of girls is 10 less than that of boys and the average weight of boys is 50 kg and the combined average weight is 45 kg then the sum of the weight of boys is how much more than that of girls?

The average weight of a group of girls is 20 kg less than that of a gr

1.	The average weight of a group of girls is 20 kg less than that of a group of boys. If the number of girls is 10 less than that of boys and the average weight of boys is 50 kg and the combined average weight is 45 kg then the sum of the weight of boys is how much more than that of girls?
A.	750 kg
B.	600 kg
C.	400 kg
D.	800 kg
E.	None of these
Answer» C. 400 kg

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The average weight of a group of girls is 20 kg less than that of a group of boys. If the number of girls is 10 less than that of boys and the average weight of boys is 50 kg and the combined average weight is 45 kg then the sum of the weight of boys is how much more than that of girls?

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