Search found 1 match


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