I couldn't understand it, may I get help please?

Probability Unit: Monty Hall Problem Probability Unit: Monty Hall Problem Question 1 (initial post): Imagine that you're on a television game show and the host presents you with three closed doors. Behind one of them, sits a sparkling, brand-new car; behind the other two, are smelly old goats. The host implores you to pick a door, and you select door #1. Then, the host, who is well-aware of what's going on behind the scenes, opens door #3, revealing one of the goats. "Now," he says, turning toward you, "do you want to keep door #1, or do you want to switch to door #2?" Statistically speaking, which choice gives you a better chance to win the car: keeping your original door, or switching? Question 2: If you stay with Door # 1, you have a 1/3 chance of winning the car. What are your chances of winning the car if you switch? Explain your reasoning. Question 3: Let's now determine what the actual chances are of winning the car if we decide to select door # 2. Use Monty Hall applet and follow the instructions listed. Play both 50 times (not 20 as the applet says). Post your results using the "pick and hold" strategy. Post your results using the "pick and switch" strategy