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nPr v nCr - Experts Exchange - The network for technology professionals.

I understand that you would you use nCr when counting the number of possible ways you can for example be dealt 5 cards out of 52, or 3 out 13. 52 C 5 and 13 C 3. When do you use nPr. What is the... ... If you would pick 3 cards out of 52, the number of .....

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