原帖由 prozzy 於 2007-5-18 23:05 發表。 
& [# e2 X8 B. Z* ?* K$ {8 z9 E8 Vtvb now,tvbnow,bttvbthe answer is -$97 for sure.
/ z$ B2 p; t4 u- K) y" x9 f9 y7 ~0 ]Think about it this way
# [0 }% p0 v3 s5 V1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。9 a% B6 [5 X1 ^: l
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.76) l. Z2 \* }- Q: M% s. \
* [1 X( O5 p3 r8 s9 o$ Wtvb now,tvbnow,bttvb tvb now,tvbnow,bttvb2 B F8 \, D! ~; i" O3 @
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb) ^+ a/ d9 i+ q- n- D e7 W
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
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! o. ? @( L2 r+ R- fI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |