Recent content by marutpadhy

Thanks for the help. But somehow, I did it ultimately. But I would also like to mention, that there is some mistake here in the solution: 1. All different: 1068 (fine) 2. One double: 378 (incorrect) 3. Two doubles: 18 (fine) Now coming to second bit: What you did there is, you didn't allow...

How many permutations of 4 letters can be made out of the letters of the word 'examination'?