你有10個波
要將呢10個波放係5個箱入面
任你點放都得
咁有幾多種可能性
f.5 maths
2011-01-05 5:53 am
回答 (2)
2011-01-13 12:30 am
✔ 最佳答案
把問題化簡:求A+B+C+D+E=10的正整數解數目，
即為 5H10=14C4=1001
2011-01-13 17:21:44 補充：
可參看:
http://hk.knowledge.yahoo.com/question/question?qid=7007092100366
2011-01-05 8:29 pm
box 1 = 10 balls, other 4 boxes = 0
box 1 = 9 balls, other 4 boxes = 1 each time
...box 1 = 0 ball
therefore, the combination nCr, n=10 and r=5
= 10x9x8x7x6/(5x4x3x2x1)
= 252 Combinations
box 1 = 9 balls, other 4 boxes = 1 each time
...box 1 = 0 ball
therefore, the combination nCr, n=10 and r=5
= 10x9x8x7x6/(5x4x3x2x1)
= 252 Combinations
收錄日期: 2021-04-16 12:04:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110104000051KK01347