原帖由 prozzy 於 2007-5-18 23:05 發表。 
9 T; ` ^- D; l/ j+ sTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。the answer is -$97 for sure. tvb now,tvbnow,bttvb% |& e& S' o3 J3 M1 \
Think about it this way
' P, c8 W- L2 [5 A7 \9 s1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)% c+ s$ k; [0 V* M) Y& H
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.76! p0 T: H% y& u+ [
8 n4 k% c9 ?- ~' ~5 \9 o9 \& E/ Y 5.39.217.76, X% p+ V: |- ^) ^
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong% w% e$ d# j+ ^6 T' ]# A
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.( r0 h( g+ [6 q
/ V8 D4 N; I, O, j, L; r7 J0 U$ TI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |