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HP Forums / HP Calculators (and very old HP Computers) / HP Prime v / Combinations bidirectional

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Combinations bidirectional
07-14-2020, 02:55 PM
Post: #1
Tonig00 Offline
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Joined: May 2016
Combinations bidirectional
Helo
COMB(n,r) gives n!/(r!(n-r)!)
But if I put
2*n!/(r!(n-r)!) how can I get
2*COMB(n,r)
Is it possible?

Thanks very much
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Combinations bidirectional - Tonig00 - 07-14-2020 02:55 PM



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