How can I calculate it with my HP...?

04162015, 04:13 PM
Post: #1




How can I calculate it with my HP...?
Can anybody give me a good advice how can I calculate the following probability example on my HP20S?
p= Cn,r(5,2) × Cn,r(85,3) ÷ Cn,r(90,5) The right result is for FIX 4 is 0.0225 Thanks! Csaba 

04162015, 05:03 PM
Post: #2




RE: How can I calculate it with my HP...?
(04162015 04:13 PM)Csaba Tizedes Wrote: Can anybody give me a good advice how can I calculate the following probability example on my HP20S? If you use registers it can easily be done with 5 INPUT 2 Cn,r STO 0 85 INPUT 3 Cn,r STO 1 90 INPUT 5 Cn,r STO 2 RCL 0 x RCL 1 / RCL 2 = Bernhard That's one small step for a man  one giant leap for mankind. 

04162015, 07:38 PM
Post: #3




RE: How can I calculate it with my HP...?
(04162015 05:03 PM)PANAMATIK Wrote: If you use registers... Thanks Bernhard  I figured out it also, but if I ask my question as "Can anybody give me a good advice how can I swim across the Atlantic Sea?" And you answer it as "If you use a boat it can easily be done", you can see that the "sailing" and "swimming" is not the same things... I tried it with some ways on my HP (for example with "forced" parentheses) and it is not works. I really like this little algebraic calc and I really like to use its functions, programming, statistics, and so on... but it's a sad thing to find a bug in the data entry routine. My calc is not here now, but I think I'll try all the functions which are use the INPUT key. Csaba 

04162015, 07:54 PM
Post: #4




RE: How can I calculate it with my HP...?
Thanks for your explanation  I first thought you were looking for a way to simplify the problem e.g. by cancelation of terms.
d:/ 

04162015, 08:56 PM
Post: #5




RE: How can I calculate it with my HP...?
(04162015 07:38 PM)Csaba Tizedes Wrote:(04162015 05:03 PM)PANAMATIK Wrote: If you use registers... Hi Csaba, Of course, I tried the parentheses too, and it didn't work. The parentheses were just ignored. It is well known that the HP20S behaviour is not consistent. Ignoring parentheses in an algebraic calculator is a bug. Perhaps there is a little relict of RPN left inside. You have to take the sailing boat. Bernhard That's one small step for a man  one giant leap for mankind. 

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