原帖由 prozzy 於 2007-5-18 23:05 發表。  公仔箱論壇' E. ~. P- P/ p/ N6 h# \
the answer is -$97 for sure. ) ]& f2 b/ k4 R$ G8 P U
Think about it this way
" [8 V# N f! Htvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇/ b7 h. {: G3 S; h. L4 `0 |
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
# Q1 D: k9 p5 t4 B. K) M7 V公仔箱論壇 8 G2 o* A9 w# ~" D* X% O# T
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
9 Q7 j. D1 F- Ltvb now,tvbnow,bttvb
; n2 O9 X1 W* u0 qtvb now,tvbnow,bttvbthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.2 y4 H0 b9 h) X3 u
, H3 {. y$ k# R$ [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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