第二題:What if not all money need be invested? 可這樣理解：

來源: 皆兄弟也 於 2010-09-08 10:37:04 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (271 bytes)
回答: 回複：回複：回複：請教解數學題。 由 guest1000 於 2010-09-07 19:51:53

Investing 16 thousand dollars to 5 possible opportunities. To some of opportunities, 0 could be invested.

The fifth opportunity is investor's wallet. There is still some money in investor's wallet, not be invested yet.

So result is C(16+5-1,5-1) = C(20,4)

請您先登陸，再發跟帖！