The ratio of number of girls to number o...

The ratio of number of girls to number of boys is 1 : 2. If the average weight of the boys is 30 kg and the average weight of both the boys and girls be 25 kg, then the average weight of the girls is :

15 kg

20 kg

35 kg

40 kg

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The ratio of number of girls to number of boys is 1:2. If the average weight of the boys is 30 kg and the average weight of both the boys and the girls be 25 kg, then the average weight of the girls is:

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