Question about Texas Instruments TI-30X-IISTK Scientific Calculator

# 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.(!)

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• Texas Instru... Master

Hello,
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.

Posted on Oct 04, 2009

• k24674 Oct 04, 2009

Sorry, answer is valid for the Multiview, not for TI-30X II. It has the permutations (nPr) and the combinations (nCr) but no factorial function.

• k24674 Oct 06, 2009

Sorry again (must be my day). The answer given initially is correct. The prb key displays nPr, nCr, the factorial function !, RAND and RANDI

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Posted on Jan 02, 2017

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## Related Questions:

### How would i key in 8! to see answer?

Here you go, Ray Ray...

In order to calculate the factorial of a number you must do the following:

2. Hit MATH
3. Scroll to PRB
4. Hit ENTER [The factorial symbol should be either the 1st one on that list or the 4th one]

Longstoryshort, if you want to find the factorial symbol on your TI-83 you must go to MATH. PRB. !. Done

By the way...that factorial is the fastest growing type of function in mathematics, and it is the backbone behind permutation, combinations, and a lot of probability theory.

Have Fun,

The Math Cheetah

Mar 13, 2011 | Texas Instruments TI-83 Plus Calculator

### How would I key in 8! in my TI-83 plus cal. thank you Raymond

8. MATH. PRB. !.

That is how you get the factorial of a number.

The factorial is beneath the PRB list, which is inside the MATH menu.

The Math Cheetah
411@themathcheetah.com

Mar 13, 2011 | Texas Instruments TI-83 Plus Calculator

### Where is the factorial key or button

There isnt such a key. Press MATH to bring up the Math menu, press left-arrow to select PRB, then press 4 to select factorial.

Sep 23, 2010 | Texas Instruments TI-83 Plus Calculator

### 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

### How do u do fractions

Enter the numerator then the division key and the denominator. Before pressing [ENTER], press [MATH][1:=>Frac] [ENTER]. The fraction will be displayed reduced.
27/48 [MATH][1:=>Frac] ENTER] yields 9/16

Dec 08, 2009 | Texas Instruments TI-83 Plus Calculator

### Where is fraction key on the ti-83 plus

Hello,
There is no key per se but a command accessible as follows
[MATH][1:->Frac] the fractions given are always reduced/

27/48 [MATH][1:->Frac][ENTER] gives 9/16

0.25 [MATH][1:->Frac] [ENTER] gives 1/4
Hope it helps

Oct 08, 2009 | Texas Instruments TI-83 Plus Calculator

### How do i do "regular" math, calculator stuck on GRAD/DRG...

Instruction booklet page 9 explains...

Aug 07, 2008 | Texas Instruments TI-30XA Calculator

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