[請益]一題來欣作業裡面的題目
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!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 211.74.216.62
→
11/29 02:14, , 1F
11/29 02:14, 1F
推
11/29 10:02, , 2F
11/29 10:02, 2F
GRE 近期熱門文章
PTT職涯區 即時熱門文章