spring water & sparkling water

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by parallel_chase » Wed Aug 27, 2008 2:37 pm
The answer is 7%

5% of spring water
10% of sparkling water

120 cases of spring water
120*5/100 = 6 cases

80 cases of sparkling water
80*10/100 = 8 cases

(6+8)/(120+80) * 100 = 14/200 * 100 =7%

Hope this helps.