想不通的问题。。。大家帮解答(说出理由)

冷酷多情

睫?冷酷
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问两杯相同多的饮品,一杯是牛奶,另一杯是咖啡。先将一勺的牛奶放进咖啡里调匀,然后再将容有牛奶的咖啡放一勺如牛奶杯里,问===是牛奶杯里的咖啡多,还是咖啡杯里的牛奶多?:confused: :confused: :lookaroun
 
lets say there is 100ml per cup
and 10 ml per spoon
u took out 10ml of the milk into the coffee which leaves 90ml of milk in the cup and 10ml of milk in the 110ml of mixture of milk and coffee
at this time, the content of coffee+milk is 100ml of coffee and 10ml of milk
which makes the percentage of the milk = 9.01%
and then you take a spoonful of coffee+milk mixture into the milk, you are actually taking 100%-9.01% coffee in the 10ml which is approx 8.99ml of coffee
 
就顺着楼上数据:第一杯100ml牛奶, 第二杯100ml咖啡, 10ml每勺

一.一勺子牛奶放入100ml咖啡:
结果:第一杯:剩余90ml牛奶
第二杯:100ml咖啡+10ml牛奶

二.从第二杯混合物取出一勺放入第一杯:
结果:第一杯:90ml牛奶+1/11(10ml)牛奶+10/11(10ml)咖啡

第二杯:100ml咖啡-10/11(10ml)咖啡+ (10ml牛奶-1/11(10ml)牛奶)


所以牛奶杯里的咖啡,咖啡杯里的牛奶一样多。
 
牛奶杯的咖啡多,所以牛奶杯里面的牛奶少,咖啡杯里的牛奶少,咖啡杯里的咖啡多
 
多少一样,含量不一样
 
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