BdMO National Junior 2010/9
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- Posts:1007
- Joined:Sat Dec 09, 2017 1:32 pm
Tom and Jerry have $14$ tiles in total.Of them $8$ are colured blue and $6$ are colured red.They want to arrange them in a straight line such that between any two red tiles there at least one blue tile.How many possible ways are there of arranging them in line?