Which of the following describes the two common roulette wheels?

• A. Double Zero Wheel
• B. Single Zero Wheel
• C. Double Zero And Single Zero
• D. European Wheel

Answer: (C)

Roulette wheels in casinos mainly come in two designs: one uses a single zero pocket (the European style), and the other adds a second green pocket—the double zero (the American style). Describing both of these formats requires mentioning both zero and double zero, so the best choice is the one that states “Double Zero And Single Zero” because it acknowledges both common wheel types in use. The other descriptions refer to only one design each (single zero or double zero, or specifically the European wheel). Understanding this helps explain why there are differences in house edge between the two wheels: European with a single zero tends to offer a lower house edge than American with both zeros, due to the extra pocket.