作者Racci (Another Day...)
看板GRE_Verbal
標題[請益]一題來欣作業裡面的題目
時間Mon Nov 27 18:10:59 2006
C-6
Bill purchase an item and receives no change. Before the purchase,
he had only a five-dollar bill. How many distinct possibilities are
there for the total amount of his purchase?
a) 3
b) 4
c) 6
d) 9
e) 10
想要請問大家
這問題要怎麼算比較好 排列組合?
我只有爛方法: 一個一個列出來 XD
感激!
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1F：→ heure:我可以說不是一種就是條件不足嗎？ 202.178.207.26 11/29 02:14
2F：推 ethan0713:請問答案是多少...140.112.200.127 11/29 10:02