1 1 vote Let S = {1, 2,......,10 }. The number of unordered pairs A, B where A and B are disjoint non-empty subsets of S is _________ (counting unordered pairs simply means we don’t distinguish the pair A,B and B,A) Mathematical Logic discrete-mathematics set-theory&algebra combinatory + – indrajeet 580 views answer comment Share Follow Print 0 reply Please log in or register to add a comment.
