11. A building consists of 12,000 Indians and Europeans. The average weight of Europeans is 70 kg and that of an Indian is 69 kg. The average weight of the whole building is 69(3/4) kg. Find the number of Indians in the building? a) 9000 b) 3000 c) 6000 d) 8000 e) NOT
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Europeans: Indians =e:I = ¾: ¼ =3:1
4parts = 12000
1 part = 3000
3parts = 9000
no. of Indians = 3000
no. of Europeans =9000
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