001
Three customer went to a hotel
The waiter said that they need to paid 300 dollars
So each of them paid 100 dollars and the total is $300
But the boss said “today they only need to paid 250 dollars”
So the boss tell the waiter to give back 50 dollars
The waiter had took $20 and give them back only $30
Each of the them got back $10
100-10=90 each person only paid $90
$90 dollars X 3 person=$270 + the $20 dollars that the waiter took.
$270+$20=$290 but they paid $300 so where the $10 went?
三個人去投宿 服務生說要300元
每個人就各出了100元，湊成 300元
後來老闆說今天特價只要 250元 。
於是老闆叫服務生把退的 50元 拿去還給他們
服務生想自己也很辛苦於是暗藏 20元，然後就把剩下的 30元 還給他們
那三個人每人拿回１０元,
100－10＝90 表示每個人只出了 90元 投宿
90元 X３人=270元 +服務生的20元＝290元
請問...那剩下的 10元 呢？？？？
