probability - How to use simple examples to explain nCr & nPr? - Mathematics Stack Exchange
What I mean is not how to use nCr. nPr. I want examples to explain why nCr is n!/(r!*(n-r)!) and why nPr is n!/((n-r)!) ... For nCr, you can always explain drafting potential athletes for your team, out of a fixed pool. For nPr, you can explain the same t...
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