Ron has to color in three shapes (square, circle and triangle) with different colors (red, blue, green). in how many different ways can the shapes be colored? ?

Square-red,blue,green
circle-red,blue,green
triangle-red,blue,green

add them together which will equal 9

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.