Permutations - Casio FX991ES Scientific Calculator

Do you want combinations or permutations? They're different things. A combination of n items taken m at a time, sometimes written "nCm", selects m items from a group of n without regard to order. A permutation of n items taken m at a time, sometimes written "nPm", selects m items from a group of m with regard to order.

Given six numbers, there are six combinations of one number, 15 combinations of two numbers, 20 combinations of three numbers, 15 combinations of four numbers, six combinations of five numbers, and one combination of six numbers.

Given six numbers, there are six permutations of one number, 30 permutations of two numbers, 120 permutations of three numbers, 360 permutations of four numbers, 720 permutations of five numbers, and 720 permutations of six numbers.

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

Number of permutations of n distinct objects taken n at a time (arrangements) is given by
P=n! In this case 7!
However the 2 O are not distinguishable one from the other. The number above must be divided by 2!
Similarly the two L are not distinguishable one from the other. The result above must be divided by 2!
Finally, the total number of permutations of the letters in HOLLOW is
7!/(2!*2!)=1260

Turn calculator ON.
If you see no icons, press the Menu key then [1] to select Run/Mat.
In Run/Mat press the OPTN key, then the F6 key to pan other tabs.
Above the F3 key you see the PROB tab. Activate it by pressing F3. The permutation Tab is above F2.
To use permutations, enter the larger number (n), press F2 [nPr] followed by the smaller number.

The permutations function (nPr) is the shifted function of the multiply key.

For example, to find the number of permutations of 10 items taken 4 at a time, press
1 0 SHIFT [nPr] 4 =

Yes, your calculator can do them. Press the PRB key to bring up the Probability menu. Among them you'll find nPr and nCr for permutations and combinations, as well as ! for the factorial.

To compute 4C2, press 4 PRB right-arrow 2 ENTER. Permutations work the same way, only without the right-arrow.

Hello,
Use the sequence [2ndF][nPr] for permutations and [2ndF][nCr] for combinations.
Exemples: 10(nPr)3 is entered as 10[2ndF][nPr]3 [=] gives 720
5(nCr)2 is entered as 5 [2ndF][nCr] 2 [=] gives 10

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.

1 to 9 sounds wrong, it should ben 10 to 9 if it is permutation order 10

Permutation : Permutation means arrangement of things. The word arrangement is used, if the order of things is considered.
Combination: Combination means selection of things. The word selection is used, when the order of things has no importance.