I-Calculator yokudibanisa (nCr)
Bala iindlela zokukhetha i-r izinto ukusuka kwi-n xa ulawulo alubalulekile.
Iinketho ze projekti
Malunga nale Calculator
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 120 distinct groups.Combinations answer "how many groups?"Combinations answer "how many groups?" — the odds in a lottery, the number of possible five-card poker hands, ways to pick a committee, or terms in Pascal's triangle.The value nCr is also called the "n choose r" number in Pascal's triangle.The value nCr is also called the "C
Imibuzo ebuza rhoqo
Yintoni ifomula yodityaniswa?
nCr = n! / (r! × (n − r)!). Kwizinto ezili-10 ezithathwe 3 ngexesha: 120 iiqela ezahlukeneyo.
Kutheni i-nCr incinci kune-nPr?
Uthelekiso aluyi kuthobela ulawulo, ngoko ke iqela ngalinye elingalunganga lihambelana ne r! iinguqulelo ezilungisiweyo. Le yisizathu sokuba i nCr = nPr ÷ r!.
Ndifanele ndisebenzise njani u combinator?
Xa ukulandelana akuyi nto ibalulekileyo: amanani e-lottery, isandla sekhadi, ukukhetha ikomiti, okanye nayiphi na ukhetho apho iqela liyinxalenye ebalulekileyo, hayi ukulungelelaniswa kwayo.
Yintoni i-binomial coefficient?
Enye igama le nCr, "n khetha r" ixabiso elivela kwi binomial theorem kwaye lidibanisa izingeniso ze Pascal' s triangle.
Yintoni i-nC0 okanye i-nCn?
Zonke zilingana 1 - kukho indlela enye yokukhetha akukho nto, nendlela enye yokukhetha zonke.
Ingaba le sixhobo sibonisa na iinguqulelo?
Ewe. Ibonisa i nPr = nCr × r! ecaleni kodityaniswa ukuze ulinganise ubalo olulungisiweyo kunye nolungalungisiweyo.
API — sebenzisa le calculator ukusuka kwikhowudi
Nceda le kalkulator njengendawo esemva ye-JSON ekhululekileyo - akukho qhosha lifunekayo. Thumela amaxabiso endawo engezantsi njengeparameter yombuzo okanye i-JSON. Funda i-API epheleleyo →
Incopho yesiphelo
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);IiNtlanganiso zeNtlanganiso yeNtlanganiso