原帖由 prozzy 於 2007-5-18 23:05 發表。 
# F8 f' o& l8 O7 x+ V; wthe answer is -$97 for sure. tvb now,tvbnow,bttvb" q. P: m8 s: c1 T4 N+ {
Think about it this way www1.tvboxnow.com8 X" @! B# Z# A1 n( m
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)4 ~: W! {& X ]! H2 ?8 [4 l3 u
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
- j a/ `6 Z. twww1.tvboxnow.com 公仔箱論壇! d, { Y" [& q- e" j
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.- S6 e; ]" x& t6 c% o
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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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