**Tell us what’s happening:**

Hello, I am having an issue with my Probability Calculator when writing the experiment function. For each num_experiments I am making a deep copy of the hat and calling the draw method with num_balls_drawn. This results in an “IndexError: list index out of range”… I am quite confused because the draw method seems to work otherwise…

Any help will be greatly appreciated. Thank you!

**Your code so far**

https://repl.it/@ariyosh/boilerplate-probability-calculator#prob_calculator.py

**Your browser information:**

User Agent is: `Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36`

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**Challenge:** Probability Calculator

**Link to the challenge:**