原帖由 prozzy 於 2007-5-18 23:05 發表。 
* F! Z) @* z9 {# M1 I2 L- z- othe answer is -$97 for sure. tvb now,tvbnow,bttvb/ ]; }; A0 w' q/ D2 p, @1 R
Think about it this way ( H. ^7 z, M5 N: ]. L
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb' }+ n' F9 \! u* c7 c7 |) @; ^
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇: P" v2 v6 O6 Z( t3 I. j- B
- @" A; X/ ^/ O$ I4 @os.tvboxnow.comthink 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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4 K- Q& e- o q: ^5 t, y9 QI 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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