Adele is buying a sport utility vehicle. She is trying to choose among a variety of options. Brand: Brand A or Brand B Transmission: 4-speed standard, 5-speed standard, or automatic Bumper: steel, vinyl, or 2x4 boards Roof: hard top or convertible top Adele calculates that she has 2 + 3 + 3 + 2, or a total of 10, possible vehicle choices
what is Adele's error?