原帖由 prozzy 於 2007-5-18 23:05 發表。 + T A" L/ g; e- n1 k4 W
the answer is -$97 for sure.
" c# c% K6 x4 _4 T2 z" _Think about it this way
; l( j9 d# j9 |8 d, H7 m q公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb# C/ Q* d% t9 I
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 9 g: Y; Z* T N) Z8 ~6 ^# ?
9 w, X+ r! C$ r6 v, `/ |( OTVBNOW 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。
$ L* i6 P% Q, J; x# M8 t3 R1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 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。# r% {+ P1 t! Y5 R" m0 n' U. h( ^
0 B! H. _6 k- Y. X4 k公仔箱論壇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.5.39.217.76% u/ e, [2 X5 x1 C5 z
: H; N- O6 C O& KTVBNOW 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。I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |