Question about Texas Instruments TI-34II Explorer Plus Calculator

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Factorials How do I do factorials on this thing?!? Also, how do I do a problem like 5C4 (5 choose 4) on this? Thanks!

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  • Anonymous Oct 07, 2008

    Finding Factorials

  • mrc895 Nov 13, 2008

    I need to know how the do factorials too! There is a button with FAC but when I push it, it doesn't do anything. How does it work?!



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Look for a key nCr. To calculate the combinations of 5 objets chosen 4 at time

5[nCr] 4 [=] gives 5
For permutations look for a key [nPr].
Hope it helps .

Posted on Sep 14, 2009

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I can't find it but you can do this:
nCk = (n choose k) = n! / k! / (n-k)!
I don't think there is any other way on this calculator.
Rate me, thanks.

Posted on Jul 08, 2009


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Related Questions:

1 Answer

How are factorials represented and calculated?

Factorial Calculator "A factorial is a function that multiplies a number by every number below it. For example 5!= 5*4*3*2*1=120. The function is used, among other things, to find the number of way "N" objects can be arranged."

Oct 13, 2015 | Casio FX-9750GII Graphing Calculator

1 Answer

I have a TI-84 Plus and I'm working with the factorial key - I continue to get an overflow error for items such as 88!2! please help

The calculator's memory is limited. The largest number it can handle is about 10^100 and that is a bit more then 69!

It you are trying to calculate the permutation and/or combinations, which involve the ratios of factorials nPr=n!/(n-r)! and nCr= n!/((n-r)!r!) you will have better luck using the relevant commands directly and not use the above divisions.

When you are calculating ratios by hand (why would you do that? you might ask) there is a simple trick you can take advantage of. It involves expanding the factorial in the numerator as in the following example:
Calculate 7!/4!=7*6*5*4!/4!=7*6*5=210.

Aug 02, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

How do i calculate combinations

Your calculator has three keys, next to which are the following markings:n! , nCr, and nPr. The one with the exclamation point is for factorials. The second is for combinations, and the third with permutations.
Syntax of the command.
If the markings are on the keys, the functions are accessed directly. If the markings are on the body of the calculator, you access the functions by pressing SHIFT and the key.

12 [!] gives 12 factorial
12 [nCr] 4 gives the combinations of 12 objects taken 4 at a time (order not important)
12 [nPr] 4 gives the permutations of 12 objects taken 4 at a time (order is important.)

Jun 09, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

When i enter the binomial probability formula into the casio fx-115es it will not operate. it says that the problem lies in the (n-X)!X! part of the formula. I'm writing everything exactly the way it is in...

You may be writing the expression as they appear in the formula, but the problem stems from the fact the factorial function increase rather rapidly and you cannot calculate the factorials of numbers larger that 69 which is the limit of the calculator.
However if you use the built in Combination function nCr, you will avoid the problem. In the binomial function, the n!/(r!(n-r)!) factor can be replaced by nCr or nC(n-r).

Do not use the explicit form with the factorials because you will get an overflow.

Nov 09, 2010 | Casio FX-115ES Scientific Calculator

2 Answers

How to solve for a factorial problem on a casio fx-9750g plus or buttons to press to get the ! how to solve for a combinations problems on a casio fx-9750 plus

There is no button but a menu tab.
In Run screen, enter the number whose factorial you want to calculate ( number can be at most equal to 69), press [OPTN][F6] to get to next page of menus.

For factorials
  • Press then [F3](PROB) then [F1] (x!) followed by [EXE].
For combinations
  • Press then [F3](PROB) then[F3][nCr][EXE]
For permutations
  • Press then [F3](PROB) then[F2][nPr][EXE]

Oct 01, 2010 | Casio FX-9750GPlus Calculator

1 Answer

I cannot figure out how to solve factorials on my TI-83 Plus.

Enter the number whose factorial you want to calculate.
Press the [MATH] key under the [ALPHA]key.
Press the Right arrow 3 times to highlight the [PROB] menu.
Select option [4:!]
Press [ENTER

Note : Due to memory limitation, the argument of the factorial function must at most be equal to 69

Jul 15, 2010 | Texas Instruments TI-83 Plus Calculator

2 Answers


It all depends on what calculator you have.

For the TI-89, Press 2ND, then press 5, then press 7, then press enter.

The the TI-84, Press 2ND, then press 0, then press 3, then press enter.

I do not believe the TI-30 can do factorials.

Oct 27, 2009 | Texas Instruments Office Equipment &...

1 Answer

What key do you use when calculating factorials? In my math book it shows 9 x! or 9!. I cannot find this key on my TI calculator.(!)

The prb key displays two menus PRB and RAND. The factorial is the third option under the PRB menu.
4 PRB 3 displays 4! which is 24.
Hope it helps.

Oct 04, 2009 | Texas Instruments TI-30X-IISTK Scientific...

1 Answer

When using the factorial functions I get Err: overflow how can I fix this

There is nothing to fix, the calculator calculates factorials up to 69! Beyond that it cannot. The largest number it can handle is 1E100.
Hope it helps.

Sep 26, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

How to do factorials in more than one step

Easy 10! / 4! / 18! don't multiply only divide.
Rate me, thanks.

Jan 24, 2009 | Texas Instruments TI-34II Explorer Plus...

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