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標題:

Percentage questions

發問:

3>A trader mixes 2 kg of butter which costs $8 per kg with 3 kg of butter which costs $6 per kg. He sells the mixture is sold at $2.55 per 250g. Find the % gain.4>Two types of coffee, one costing $9 per kg and the other one costing $13 per kg, are mixed in the ratio 3:1. The mixture is sold at $1.25... 顯示更多 3>A trader mixes 2 kg of butter which costs $8 per kg with 3 kg of butter which costs $6 per kg. He sells the mixture is sold at $2.55 per 250g. Find the % gain. 4>Two types of coffee, one costing $9 per kg and the other one costing $13 per kg, are mixed in the ratio 3:1. The mixture is sold at $1.25 per 100 g. Find the % gain.

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最佳解答:

3)cost for every gram = 1.7 2.55/1.7 = 1.5 so 50%gain. 9x 0.1 x 0.75 + 13x0.1x0.25 =1 1.25/1 x100%=125% 25%gain... 2006-12-04 17:11:46 補充： 3)第一款溝埋有5公斤，所須成本為$8 x2 $6 x3 = 34五公斤。除番開一公斤成本要6.8元。二百五十克ge成本就要1.7元，而售價為$2.25元...即成本的一百五十巴仙，所以就gain50%4)比例係三比一，3果隻就9蚊一公斤，一份果隻就13蚊一公斤...100克要75gram9蚊咖啡，25gram13蚊咖啡75gram9蚊咖啡要 9 x0.075 =$0.67525gram13蚊咖啡要13 x 0.02 =$0.325 埋就係一蚊...即係一百克就gain 25cents 即係25%gain~~

其他解答:7638E7481407D16B