I can't find the combinations (nCr) button on the fx 9750G11 calculator

Turn calculatorOn.
Press the Menu button.
Press 1 for Run screen
Press OPTN
Press F6>
Press F3:PROB
Enter the number whose factorial you wan, then press F1:x!Note that the number must be less than 70.
For combinations and permutations, use F3:nCr, or F2:nPr

Combination are calculated using the nCr key. For Permutations use the nPr key.

Use nCr (the shifted function of the divide key). For example, to find the number of combinations of five things taken three at a time, press 5 SHIFT nCr 3 = and see 10.

Use the combination function. It's the shifted function of the divide key, marked nCr. For example, to find the number of combinations of 9 things taken 3 at a time, press 9 SHIFT divide 3 = and see 84.

Press [SHIFT][ division key]. It is marked with nCr.

Please read the manual of the calculator. When you go from a scientific calculator to a graphical one there are some simple functionalities that are dropped. If you have any inequalities to solve use the graphing feature. Your solution set will be shaded.

It is a calculator and prqactically every button is a MATH button. It depends on what MATH you intend to do. Put the calculator in Run/Mat screen then press the OPTN key. You will see several tabs. Press the function key under a TAB and explore what is offered. Go through all the keys (F6 also) and see what the new tabs do.
In general it is most helpful to read the manual that shipped with the calculator.

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]

Hello,

The binomial probability distribution is defined as
P(r;p;n) =(nCr)(p^r)*(1-p)^(n-r)
where n is the number of trials, p the probability of success, and r the expected result.

Let n=20, r=7, p=0.15 ( I do not know wether this exemple has any meaning in the context of your problem, but you have to enter values that mean something to you. I am only showing you the key strokes

To enter 20C7 you press 20 [SHIFT][nCr]7 ;
To enter 0.15 to the power 7 you type 0.15[X to ] 7 the key is between
[x²] and [log]

To enter (1-0.15) to power 20-7, you type 0.85 [X to] 13
With [*] standing for multiplication key , and [X to] the raise to power key, the exemple above can be entered as

( 20 [SHIFT][nCr] 7) [*] ( 0.15 [X to] 7 ) [*] ( 0.85 [X to] 13 ) [=]

Here is a screen capture to show you what it looks like. However on this calculator the combination 20 [SHIFT][nCr] 7 is represented as nCr(20,7).



Hope it helps

You can enter combinations and permutations.

If the order of the selection matters (ie. 1st, 2nd, and 3rd place out of 40 contestants) use permutation. Enter:

40{shift}{nPr}3 and then [=] for your answer set (=59280 possible ways).

IF order doesn not matter (ie. a team of 3 from 40 possible members) then it is a combination. Do the same as above, but substitute {nCr} for {nPr}. (= 9880 possible ways).

For your question: a three-digit set, selecting from 0-9. There is no specified order, it is a combination. The total n=10 (there are 10 digits in the range 0-9) and you are selecting 3.

so.... 10[nCr]3 with give the number of possible combinations.