Warning: This is experimental, and may produce incorrect results. You are responsible for verifying any results before you use them.
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Results will be slightly (~1%) off from the real rate as calculations are made by summing the individual draw rates, which are given rounded.
Draws are currently only calculated as single draws. In 10-part draws, real SR rates will be slightly higher and real R rates will be slightly lower. If you know how to efficiently calculate the cumulative probability of two binomial distributions with different probabilities, I'd like to hear from you.