標題: [Core] Premutation Problem [打印本頁] 作者: himhim88 時間: 2016-4-9 08:36 PM 標題: Premutation Problem
pls help
作者: 0310672 時間: 2016-4-9 09:39 PM
作者: speedoflight 時間: 2016-4-9 10:54 PM
For each pen, there are 3 pencil cases to be selected. Therefore, the required number of ways = 3x3x3x3x3x3 = 3^6 = 729 作者: himhim88 時間: 2016-4-10 12:25 AM 標題: 回覆 2# 0310672 的帖子