Kuphatikiza Calculator (nCr)
Kuwerengera njira kusankha r zinthu kuchokera n pamene ndondomeko si nkhani.
Zithunzizi zimasintha monga momwe mumalemba.
Zachidule
combination counts how many ways you can choose r items from a set of n when order does not matter — picking the same group in a different sequence counts once. This calculator returns the exact count, the formula, and the matching number of ordered arrangements (nPr) for comparison. Choosing none or all gives nC0 = nCn = 1, and as with permutations, r cannot exceed n. A combination counts how many ways you can choose r items from a set of n when order does not matter — picking the same group in a different sequence.Combinations answer "how many groups?" —The formula is nCr = n! / (r! × (n − r)!). For 10 items taken 3 at a time there are 120CombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinationsCombinations
Mafunso ofunsidwa nthawi zambiri
Kodi ndi chiyani formula yophatikizika?
nCr = n! / (r! × (n − r)!). Kwa 10 zinthu anatenga 3 pa nthawi: 120 osiyana mabungwe.
N'chifukwa chiyani nCr ndi wamkulu kuposa nPr?
Mgwirizano amasiya kuganizira lamulo, kotero aliyense unordered gulu likufanana ndi r! osankhidwa permutations. Izi ndi chifukwa nCr = nPr ÷ r!.
Kodi ndiyenera kugwiritsa ntchito kugwirizana?
Ngati lamulo sichingakhale chofunika: lottery ziwerengero, m'manja kagawo, kusankha kagawo, kapena chilichonse chosankha pamene gulu ndi zimene zimadalira, si ndondomeko yake.
Kodi ndi chiyani binomial coefficient?
Izi ndi zina mwazinthu zomwe zimachititsa kuti mfundo za m'Baibulo zikhale zothandiza pa nkhani ya kuphunzira Baibulo, monga mmene zilili m'Baibulo la Chiheberi.
Kodi ndi nC0 kapena nCn?
Omwe awiri ali 1 - pali njira imodzi kusankha wina, ndi njira imodzi kusankha iwo onse.
Kodi ntchitoyi imasonyezanso permutations?
Yes. It amasonyeza nPr = nCr × r! pafupi ndi kugwirizana kuti muthe kuyerekezera osankhidwa ndi unordered counts.
API — kugwiritsa ntchito izi calculator kuchokera code
Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Chomweko chilichonse chimene mumasiya chimagwiritsa ntchito mfundo yoyamba yomweyi yomwe tsambali limagwiritsa ntchito; mfundo yosadziwika ndi 400, siyiyenera kukhala zero yosadziwika. Onani zonse API docs →
Chithunzi
GET https://calculator.free/api/v1/combination/curl
curl "https://calculator.free/api/v1/combination/?n=10&r=3"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/combination/?" + new URLSearchParams({
"n": "10",
"r": "3"
}));
const data = await r.json();
console.log(data.results);Zimenezi ndi zowerengera zokhudzana ndi malangizo amtundu uliwonse, si zokhudzana ndi ndalama, zamoyo kapena zokhudzana ndi ndalama.