That's a very naïve implementation. You calculate n! a total of (n-k+1) times. You calculate 0.5x * 0.5n-x just as many times even though it's always equal to 0.5n. At the very least, doing some simple math legwork first would go a long way.

In reply to Re: Calculate propabilities without recursion? Coin toss. by ikegami
in thread Calculate propabilities without recursion? Coin toss. by Microcebus

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