A bag holds 13 marbles. 6 are blue, 2 are green, and 5 are red. if you select two marbles from the bag in a row, what is the probability that the first marble is blue and the second marble is green? write is probabilities and your answer as fractions. note: you are not replacing any marbles after each selection.

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.