原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇) \0 T+ \' m# h' ?: I- o
the answer is -$97 for sure. . Q2 v9 o% {9 p3 A8 o( k5 j: |
Think about it this way
( Q- j( s- j% j, o1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
# g2 f9 c& `# {; B- L2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5 ^, ?" l% D3 ~7 n% |公仔箱論壇
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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 wrong5.39.217.76# h" M- ~( J! o& e4 I
; _" _ M( z& r5 G+ r7 I& Mthink 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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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |