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Casio College 2D+ fx-92B

Alzou Posted messages 6 Status Membre -  
[Dal] Posted messages 6205 Registration date   Status Contributeur Last intervention   -
Hello,

I have a huge problem, it's Sunday and I have a math test on combinatorics on Tuesday. The issue is that the others have a Texas calculator with the nCr button to enter combinations, but I don't have it on my Casio. So I was wondering if anyone could help me figure out how to enter probabilities on my calculator. With this format, even if I go into shift-setup or just mode, I don't get the options for probabilities to appear.

Does anyone know how to urgently help me?

Thanks in advance

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quent217 Posted messages 424 Status Membre 348
 
Hello,
I am surprised that there are no combinations on your calculator; normally, it's just a C and you have to write nCk.
Otherwise, if you have factorials (the exclamation point), you can use the formula (n!)/(k!×(n-k)!) which calculates k out of n.
And if you are using combinations for the binomial distribution, you might have a function called BinomialPD which allows you to calculate P(X=n)

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Alzou
 
Hello Quent, it's Alzou and unfortunately no, I don't have those options on my calculator :/
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quent217 Posted messages 424 Status Membre 348
 
Hello,
I just looked at the images online and there is indeed the factorial with the shift and the closing parentheses. It's true that it's not very practical to write the formula I gave you every time, but apparently your calculator isn't designed to handle binomial distributions (which is normal since it's a middle school calculator), so you'll have to make do with what you have. Besides, if you need to do this kind of calculation, I assume you're at least in high school, so if you have the chance to buy a high school calculator like the Graph 35+, it will really come in handy even for the future. And I don't know how you managed in class, but you should have realized before the weekend prior to your test that you don't have the necessary functions.

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[Dal] Posted messages 6205 Registration date   Status Contributeur Last intervention   1 108
 
If your calculator is indeed this one: http://www.casio-education.be/calculatrice_casio_documents/notices/fx-92B_College2D+_F.pdf on page F-18 (page 19 of the .pdf) it explains how to use "CALC" to "save calculation expressions that contain variables, which you can then recall in COMP Mode."
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