HP 10BII Combination Permutation

07112021, 05:29 AM
(This post was last modified: 07112021 05:44 AM by Gamo.)
Post: #1




HP 10BII Combination Permutation
HP 10BII+ got this functions but not for the HP 10BII
HP 10BII User Manual doesn't provide the way to calculate this and here is my attempt. Formulas: Permutation: nPr = n! ÷ [ (n  r)! ] Combination: nCr = n! ÷ [ r! x (n  r)! ] Example: 6P3 6 [] 3 [=] [n!] [÷] 6 [n!] [SWAP] [=] display answer 120 6C3 6 [] 3 [=] [n!] [x] 3 [n!] [=] [÷] 6 [n!] [SWAP] [=] display answer 20 Remark: The Factorial Function limit is up to 253! = 5.17 E499 Gamo 7/2021 

07212021, 08:10 AM
(This post was last modified: 07212021 08:11 AM by Gamo.)
Post: #2




RE: HP 10BII Combination Permutation
Update key steps for both the "Combination and Permutation" by the use
of the memory key [→M] Example: ►A child has a set of toy blocks with the 26 letters of the alphabet each appearing once. How many different threeletter permutation ( 26P3 ) can be made with these blocks? 26 [→M] [] 3 [=] display 23.00 [n!] display 2.59 E22 [÷] [RM] [n!] display 4.03 E26 [SWAP] [=] display answer 15,600.00 ►A manager wants to choose a committee of three people from the seven engineers working for him. In how many different ways cn the committee be selected? ( 7C3 ) 7 [→M] [] 3 [=] display 4.00 [n!] display 24.00 [x] 3 [n!] [=] display 144.00 [÷] [RM] [n!] display 5,040.00 [SWAP] [=] display answer 35.00 Gamo 

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