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for n things not to be in their right places
no. of ways = n!{1/2!-1/3!+....(-1)^n*1/n!} where n>=2
so we will have this one as 265 ways
- by reddy43
Wed Oct 27, 2010 7:29 am- Forum: Problem Solving
- Topic: Tricky PnC and probablity question
- Replies: 11
- Views: 5130