An mp3 player has 12 songs on shuffle. how many different orders can the songs play

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

B) greg: 30 points , tremaine 38 points

Not sure what the question is but i hope this x = years100 * x