Hannah Is Getting Dressed For A Party She Plans To Wear Either Shorts Or Jeans A

Hannah is getting dressed for a party. She plans to wear either shorts or jeans, a red, blue or green shirt, and flip flops or tennis shoes. According to the tree diagram, how many possible outfits can she make?

https://www.usatestprep.com/modules/gallery/files/11/1194/1194.gif