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Updated Mar 26, 2026
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Osnove kombinatorike: Permutacije, variacije in kombinacije
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Osnove kombinatorike
Če se sprašuješ, zakaj se sploh učiti štetje, je odgovor preprost - kombinatorika je temelj za računanje verjetnosti. Brez nje ne moreš rešiti niti osnovnih problemov z verjetnostjo.
Osnovno pravilo produkta je tvoj najboljši prijatelj: če lahko prvi dogodek izvedeš na n₁ načinov, drugega na n₂ načinov, potem lahko oba skupaj izvedeš na n₁ × n₂ načinov. Na primer, če mečeš kovanec (2 možnosti) in kocko (6 možnosti), imaš skupaj 2 × 6 = 12 možnih izidov.
Preden začneš reševati katerikoli problem, si vedno zastavi dve ključni vprašanji: Ali je vrstni red pomemben? Ali se elementi lahko ponavljajo? Odgovora na ti vprašanji določita, katero formulo uporabiš.
Nasvet: Zapomni si, da je fakulteta (n!) produkt vseh naravnih števil od 1 do n, in da je 0! = 1!
Permutacije - razporeditve
Ko govorimo o permutacijah, mislimo na razporeditve elementov, kjer je vrstni red izjemno pomemben. Predstavljaj si, da razporejaš knjige na polici - Ana, Blaž, Cveta ni isto kot Cveta, Blaž, Ana.
Za permutacije brez ponavljanja uporabiš formulo Pₙ = n!. Če imaš 5 različnih knjig, jih lahko razporediš na 5! = 120 načinov.
Pri permutacijah s ponavljanjem je stvar nekoliko bolj zapletena. Če imaš besedo "MATEMATIKA" z 10 črkami, kjer se M ponavlja 2-krat, A 3-krat in T 2-krat, uporabiš formulo: P^(k₁,k₂,...)ₙ = n!/(k₁! × k₂! × ...)
Za MATEMATIKA: 10!/(2! × 3! × 2!) = 151.200 različnih anagramov. Precej več, kot bi morda pričakoval!
Pozor: Permutacije so samo poseben primer variacij, kjer izberemo vse elemente .
Variacije - izbire z vrstnim redom
Variacije se uporabijo, ko izbiraš samo nekaj elementov iz večje množice, vrstni red pa je še vedno pomemben. Pomisli na izbiro predsednika, podpredsednika in tajnika v razredu - to so variacije!
Za variacije brez ponavljanja uporabiš V^k_n = n!/!. Če v razredu s 25 dijaki izbiraš predsednika, tajnika in blagajnika, imaš V^3₂₅ = 25 × 24 × 23 = 13.800 možnosti.
Pri variacijah s ponavljanjem je formula preprosta: V̄^k_n = n^k. Za 4-mestno PIN kodo z možnimi števkami 0-9 imaš 10⁴ = 10.000 možnosti.
Ključna razlika je v tem, ali se lahko isti element pojavi večkrat. Pri izbiri funkcij v razredu ena oseba ne more imeti več funkcij, pri PIN kodi pa se lahko ista števka ponovi.
Pomembno: Vedno preveri, ali se elementi lahko ponavljajo - to popolnoma spremeni pristop!
Kombinacije - izbire brez vrstnega reda
Kombinacije so najlažje za razumevanje: vrstni red sploh ni pomemben. Če izbiraš 5 prijateljev za zabavo, ni važno, v katerem vrstnem redu jih izbereš - glavno je, kdo bo prišel.
Formula za kombinacije je C^k_n = (n choose k) = n!/. Binomski simbol (n choose k) se bere "n nad k" in predstavlja število načinov za izbiro k elementov iz n možnih.
Klasičen primer: za Loto izbiraš 7 številk iz 39. To je C^7₃₉ = 15.380.937 možnosti - zato je loto tako težko zadeti!
Pri pokru moraš uporabiti pravilo produkta: izbereš vrednost (13 možnosti), nato vse 4 karte te vrednosti (1 možnost) in eno poljubno karto (48 možnosti). Skupaj: 13 × 1 × 48 = 624 ugodnih izidov od 2.598.960 možnih.
Nasvet za maturo: Pri verjetnosti vedno preveri, ali si za števec in imenovalec uporabil isti tip štetja!
Praktični nasveti in pogoste napake
Odločitveni proces je preprost: najprej preveri, ali je vrstni red pomemben. Če je, gre za permutacije (vse elemente) ali variacije (samo nekatere). Če ni, so to kombinacije.
Nato preveri ponavljanje elementov. To določi, ali uporabiš standardne formule ali tiste s ponavljanjem.
Najpogostejše napake vključujejo mešanje variacij in kombinacij. Vedno se vprašaj: ali je {Ana, Blaž} enako kot {Blaž, Ana}? Če je, uporabi kombinacije. Če ni, so to variacije.
Pri problemih z verjetnostjo pazi na konsistentnost - če za imenovalec uporabiš kombinacije, jih moraš tudi za števec. Ne pozabi, da je 0! = 1, kar pogosto potrebuješ pri računanju.
Za hitro ponavljanje: Permutacije = razporeditve, Variacije = izbire z vrstnim redom, Kombinacije = izbire brez vrstnega reda!
Hitri povzetek formul
Pravilo produkta: Za zaporedne dogodke možnosti pomnožiš.
Permutacije: Pₙ = n! (razporeditev vseh) ali P^(k₁,k₂,...)ₙ = n!/(k₁!k₂!...) (s ponavljanjem)
Variacije: V^k_n = n!/! (brez ponavljanja) ali V̄^k_n = n^k (s ponavljanjem)
Kombinacije: C^k_n = n!/ (izbira brez vrstnega reda)
Verjetnost: P(A) = ugodni izidi / vsi možni izidi (oba izračunana s kombinatoriko)
Zaključni nasvet: Te formule boš potreboval na maturi, zato jih vadim toliko, da jih znaš uporabiti brez premisleka!
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4.7/5
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Osnove kombinatorike: Permutacije, variacije in kombinacije
Kombinatorika je v bistvu umetnost štetja - naučila te bo, kako prešteti vse možnosti in izračunati verjetnosti. To je ključno znanje za maturo in praktično uporabno v vsakdanjem življenju.
Osnove kombinatorike
Če se sprašuješ, zakaj se sploh učiti štetje, je odgovor preprost - kombinatorika je temelj za računanje verjetnosti. Brez nje ne moreš rešiti niti osnovnih problemov z verjetnostjo.
Osnovno pravilo produkta je tvoj najboljši prijatelj: če lahko prvi dogodek izvedeš na n₁ načinov, drugega na n₂ načinov, potem lahko oba skupaj izvedeš na n₁ × n₂ načinov. Na primer, če mečeš kovanec (2 možnosti) in kocko (6 možnosti), imaš skupaj 2 × 6 = 12 možnih izidov.
Preden začneš reševati katerikoli problem, si vedno zastavi dve ključni vprašanji: Ali je vrstni red pomemben? Ali se elementi lahko ponavljajo? Odgovora na ti vprašanji določita, katero formulo uporabiš.
Nasvet: Zapomni si, da je fakulteta (n!) produkt vseh naravnih števil od 1 do n, in da je 0! = 1!
Sign up to see the contentIt's free!
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Permutacije - razporeditve
Ko govorimo o permutacijah, mislimo na razporeditve elementov, kjer je vrstni red izjemno pomemben. Predstavljaj si, da razporejaš knjige na polici - Ana, Blaž, Cveta ni isto kot Cveta, Blaž, Ana.
Za permutacije brez ponavljanja uporabiš formulo Pₙ = n!. Če imaš 5 različnih knjig, jih lahko razporediš na 5! = 120 načinov.
Pri permutacijah s ponavljanjem je stvar nekoliko bolj zapletena. Če imaš besedo "MATEMATIKA" z 10 črkami, kjer se M ponavlja 2-krat, A 3-krat in T 2-krat, uporabiš formulo: P^(k₁,k₂,...)ₙ = n!/(k₁! × k₂! × ...)
Za MATEMATIKA: 10!/(2! × 3! × 2!) = 151.200 različnih anagramov. Precej več, kot bi morda pričakoval!
Pozor: Permutacije so samo poseben primer variacij, kjer izberemo vse elemente .
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Variacije - izbire z vrstnim redom
Variacije se uporabijo, ko izbiraš samo nekaj elementov iz večje množice, vrstni red pa je še vedno pomemben. Pomisli na izbiro predsednika, podpredsednika in tajnika v razredu - to so variacije!
Za variacije brez ponavljanja uporabiš V^k_n = n!/!. Če v razredu s 25 dijaki izbiraš predsednika, tajnika in blagajnika, imaš V^3₂₅ = 25 × 24 × 23 = 13.800 možnosti.
Pri variacijah s ponavljanjem je formula preprosta: V̄^k_n = n^k. Za 4-mestno PIN kodo z možnimi števkami 0-9 imaš 10⁴ = 10.000 možnosti.
Ključna razlika je v tem, ali se lahko isti element pojavi večkrat. Pri izbiri funkcij v razredu ena oseba ne more imeti več funkcij, pri PIN kodi pa se lahko ista števka ponovi.
Pomembno: Vedno preveri, ali se elementi lahko ponavljajo - to popolnoma spremeni pristop!
Sign up to see the contentIt's free!
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Join milions of students
Kombinacije - izbire brez vrstnega reda
Kombinacije so najlažje za razumevanje: vrstni red sploh ni pomemben. Če izbiraš 5 prijateljev za zabavo, ni važno, v katerem vrstnem redu jih izbereš - glavno je, kdo bo prišel.
Formula za kombinacije je C^k_n = (n choose k) = n!/. Binomski simbol (n choose k) se bere "n nad k" in predstavlja število načinov za izbiro k elementov iz n možnih.
Klasičen primer: za Loto izbiraš 7 številk iz 39. To je C^7₃₉ = 15.380.937 možnosti - zato je loto tako težko zadeti!
Pri pokru moraš uporabiti pravilo produkta: izbereš vrednost (13 možnosti), nato vse 4 karte te vrednosti (1 možnost) in eno poljubno karto (48 možnosti). Skupaj: 13 × 1 × 48 = 624 ugodnih izidov od 2.598.960 možnih.
Nasvet za maturo: Pri verjetnosti vedno preveri, ali si za števec in imenovalec uporabil isti tip štetja!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Praktični nasveti in pogoste napake
Odločitveni proces je preprost: najprej preveri, ali je vrstni red pomemben. Če je, gre za permutacije (vse elemente) ali variacije (samo nekatere). Če ni, so to kombinacije.
Nato preveri ponavljanje elementov. To določi, ali uporabiš standardne formule ali tiste s ponavljanjem.
Najpogostejše napake vključujejo mešanje variacij in kombinacij. Vedno se vprašaj: ali je {Ana, Blaž} enako kot {Blaž, Ana}? Če je, uporabi kombinacije. Če ni, so to variacije.
Pri problemih z verjetnostjo pazi na konsistentnost - če za imenovalec uporabiš kombinacije, jih moraš tudi za števec. Ne pozabi, da je 0! = 1, kar pogosto potrebuješ pri računanju.
Za hitro ponavljanje: Permutacije = razporeditve, Variacije = izbire z vrstnim redom, Kombinacije = izbire brez vrstnega reda!
Sign up to see the contentIt's free!
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Hitri povzetek formul
Pravilo produkta: Za zaporedne dogodke možnosti pomnožiš.
Permutacije: Pₙ = n! (razporeditev vseh) ali P^(k₁,k₂,...)ₙ = n!/(k₁!k₂!...) (s ponavljanjem)
Variacije: V^k_n = n!/! (brez ponavljanja) ali V̄^k_n = n^k (s ponavljanjem)
Kombinacije: C^k_n = n!/ (izbira brez vrstnega reda)
Verjetnost: P(A) = ugodni izidi / vsi možni izidi (oba izračunana s kombinatoriko)
Zaključni nasvet: Te formule boš potreboval na maturi, zato jih vadim toliko, da jih znaš uporabiti brez premisleka!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user