原帖由 prozzy 於 2007-5-18 23:05 發表。  ; U+ _3 J2 ]" H, s" @; M K5 Y! O
the answer is -$97 for sure. tvb now,tvbnow,bttvb6 T z+ P9 f- X: q" E
Think about it this way tvb now,tvbnow,bttvb5 P+ V3 ], \! {! ]( q0 {- P
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
" w/ z# s. k. R9 N v1 o) z- Vtvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ...
5.39.217.761 b9 A" X) d$ H E7 _. c& S7 _
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% z; E, v' q; z
: d, d" s+ o2 \! f! j5.39.217.76think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
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. t/ x! E( F* t; c$ y7 U! \5.39.217.76I 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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