Jenson is picking out what to wear to school. He has three clean T-shirts: one white, one red, and one orange. He also has two clean pairs of jeans: one blue and one gray. The tree diagram shows the different outcomes of picking a pair of jeans and a T-shirt.

there are 6 outcomes 
white-Blue-Grey(2 outcomes)
Red-blue-grey(2 outcomes)
orange-blue-grey(2 outcomes)
If I miss understood the question please let me know so I can correct myself.