UPSC CSAT - All about Permutation & Combination | UPSC 2024 | Short Tricks | OnlyIAS CSAT

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  • Опубликовано: 19 дек 2024

Комментарии • 384

  • @Ari-ly1uc
    @Ari-ly1uc 8 месяцев назад +7

    This cleared a lot of doubts especially when you linked different year's PYQs of similar types together. Earlier I was solving SSC CGL Qs of PnC using different formulas but upsc asks different types of PnC questions and I wasted so much time in those Qs which UPSC will never ask. Thanks for this wonderful session.

    • @binaykumarm4029
      @binaykumarm4029 7 месяцев назад +3

      I also did the same 😢 but any way we found a great youtube channel with great teacher , i feel so blessed and i am so thankful 🙏 to risabh sir ❤

  • @madhulikapratapsingh5564
    @madhulikapratapsingh5564 10 месяцев назад +23

    I am so grateful I found such an incredible teacher, who teaches every subject with an aim to bas aisa padha do ki zindagi bhar ke liye samajh aa jaye. Teachers like him are a true gem. This is true service to humanity. I will be forever thankful to you Sir. Thank you for existing. 🙏

  • @mknayakthewarrior
    @mknayakthewarrior 10 месяцев назад +10

    Salute sir ,itne simple se samjhaya koi math teacher bhi samajha paate hain

  • @kajalchaudhary9204
    @kajalchaudhary9204 8 месяцев назад +1

    Kya gajab teacher hai maine enke eco k bhi lecture dekhe 🙏🙏

  • @philanthropist2249
    @philanthropist2249 13 дней назад +1

    1:33:16 Correct Answer - Option 4 : None of the above
    One post of Principal is to be filled and two posts of Vice Principal are to be filled.
    No. of eligible candidate for the post of principal = 2
    No. of eligible candidate for the post of vice principal =(6-1) 5
    Possible no. of combinations = 2C1 × 5C2 = 20
    Hence, option 4 is the correct answer.
    I wish you all the best future IAS 🥰

  • @nidhiyadav-mi4qp
    @nidhiyadav-mi4qp 8 месяцев назад +14

    40:17 question SCHOOL - 360
    Question LAYOUT -144
    Thank you sir

    • @FGSakshii
      @FGSakshii 6 месяцев назад

      360 , can u explain.

    • @bajranglohra1524
      @bajranglohra1524 6 месяцев назад

      @@FGSakshii 6 letters ka 6! and oo ka 2!
      6!/2!=360

    • @saturnsbaby5683
      @saturnsbaby5683 6 месяцев назад

      It's 720. Vowels toh pucha nahi arrange karne ke liye​@@bajranglohra1524

  • @kritikasharma101
    @kritikasharma101 6 месяцев назад +4

    40:12 m 1). 360
    2). 144

  • @ShreyaSonkar1220
    @ShreyaSonkar1220 8 месяцев назад +2

    You are the best teacher in mathematics 😊😊
    Aaj tk Maine bahoot se teacher se padha probability and permutations and combination but Mera concept clr nhi hua aapki class krne se sabhi concept clr ho gye
    Thanku so much sir🙏🙏🙏🙏❤️❤️😀😀

  • @mknayakthewarrior
    @mknayakthewarrior 9 месяцев назад +4

    Sir itne lucid ,crystal and clear with conceptual clarity ke saath koi nhi padhata

  • @meltherecafe2394
    @meltherecafe2394 6 месяцев назад +9

    No one teaches CSAT as nicely as him!

  • @gungungupta7765
    @gungungupta7765 10 месяцев назад +12

    40:12 School ans 360 layout ans 144

    • @siddhimishra4708
      @siddhimishra4708 8 месяцев назад

      please explain layout

    • @Gaurav-fz9qr
      @Gaurav-fz9qr 8 месяцев назад +2

      @@siddhimishra4708 LAYOUT ( vowels= AOU)(Consonants=LYT) , consider AOU as 1st , L=2nd, Y=3rd and T=4th = 4!; & AOU can be arranged in 3ways like OUA , AUO,OAU = 3! , So 4!*3! = 144

    • @siddhimishra4708
      @siddhimishra4708 8 месяцев назад +1

      @@Gaurav-fz9qr thanks

  • @philanthropist2249
    @philanthropist2249 13 дней назад

    1:33:24 Correct Answer - Option 4 : 32
    Given
    Total number of Question = 5
    Formula Used
    total number of ways = (no. of ways)no. of times
    Calculation
    ⇒ maximum number of candidates = (2)5 ⇒ 2 × 2 × 2 × 2 × 2 = 32
    ∴ The maximum number of candidates is 32
    I wish you all the best future IAS 🥰

  • @rajangupta19675
    @rajangupta19675 9 месяцев назад +1

    1:33:34 5 Question of true and false can be answered in 2×2×2×2×2 ways i.e 32 ways.It means in worst case there can be 32 students that can give different answers.33rd student's answer will match with any other student for sure.

    • @mrighsharma6155
      @mrighsharma6155 9 месяцев назад

      Plz tell ki 32 ans kaise hoga ye toh no of diff ways aye jisme students ans de skte h toh itne students kaise hue and also agr hue bhi toh ye kaise ensure hua ki do students ke ans indentical seq mein ni h??

    • @rajangupta19675
      @rajangupta19675 9 месяцев назад

      @@mrighsharma6155 in question it is asked the maximum number of students that can be there

    • @rajangupta19675
      @rajangupta19675 9 месяцев назад +2

      You have to assume every student answer differently.In that case maximum 32 students can be possible with each answering differently

  • @Origin1303
    @Origin1303 9 месяцев назад +11

    One of the best lecture on Such a difficult topic ..Thank You Soo Muchh Sir ❤

  • @harshupadhyay8737
    @harshupadhyay8737 21 день назад +1

    sir in the 1:10:16 mints the answer will be 9 because sir you have taken (1,4,2) which will make 6 as 1 is not required there sir the total cominations will be 9

  • @soubhagyajigautam522
    @soubhagyajigautam522 10 месяцев назад +39

    RISHAV = One Man Army
    Rishav= Backbone of the channel "OnlyIas Extended"
    Rishav= One of the Pillars of OnlyIAS
    For me, OnlyIAS is nothing but Rishav Sir...not even Sumit sir, just Rishav Sir, My Favourite Teacher

    • @kajalchaudhary9204
      @kajalchaudhary9204 8 месяцев назад +5

      Same baaki sbh pdhai km backchodi zyada krte h 😂😂

  • @RamandeepKaurSidhu-s2k
    @RamandeepKaurSidhu-s2k 4 месяца назад +2

    Rishav sir is perfect example of... "Punjabi aage oyeee"
    He teaches very well...🤗either its economy or CSAT.

  • @Akashpatelup32
    @Akashpatelup32 10 месяцев назад +3

    40:12 HW SOL.
    1)School ans 360
    2) layout ans 144

    • @mohamunichakma
      @mohamunichakma 9 месяцев назад

      please explain me the Layout answer.. I am very weak in maths🙏

  • @laxmipriyasingh0197
    @laxmipriyasingh0197 6 месяцев назад

    1:33:14 - ans-D - 2*5*4=40 as they all are eligible for vice principal post. If 1 of 2 principal candidates becomes principal, remaining 5 are eligible for v.p . So (5*4 for v.p )and *(*2 for principal post)

    • @g.o.a.t7734
      @g.o.a.t7734 6 месяцев назад

      Bro it's 22 you should add p & vp

  • @harshupadhyay8737
    @harshupadhyay8737 21 день назад +1

    and sir thank you for teaching us in such a simple and easy way so that we could understand the concept and sir we all appreciate your efforts sir

  • @vaidehikadam4402
    @vaidehikadam4402 9 месяцев назад +2

    Was so scared of this topic, but you made it sooo easy to understand!! Thanks a lot sir

  • @mickymini123
    @mickymini123 6 месяцев назад +1

    Very helpful session. You made it all super easy to understand and remember. Thank you so much sir!😊

  • @ravimaurya9617
    @ravimaurya9617 10 месяцев назад +31

    Sir next probility topic complete karenge to bhut helpfull hoga

    • @a.k4394
      @a.k4394 10 месяцев назад +2

      Probability hota hai wo

    • @madhavsharma145
      @madhavsharma145 10 месяцев назад +2

      ​@@a.k4394kyo bechare ko guilt feel kra rhe ho, sir usko alag se probility pdha denge 😂😂

    • @geetasinghla7850
      @geetasinghla7850 10 месяцев назад

      Yes sir please

    • @AnilKataria-ys1os
      @AnilKataria-ys1os 6 месяцев назад

      "Probability" & "helpful"

    • @ALIYAfutureIAS
      @ALIYAfutureIAS 6 месяцев назад

      Pdf nhi Kiya kya?

  • @anitchaudhari3592
    @anitchaudhari3592 10 месяцев назад +2

    Thank you so much sir for Important session . today clear all concept of permutation and combination topic . Thanks a lot again

  • @Live-like-a-king-mann
    @Live-like-a-king-mann 8 месяцев назад +2

    Such me. Itna easy way se btae hai aap

  • @RockstarRadha-m9g
    @RockstarRadha-m9g 6 месяцев назад +2

    Thank you very much sir, I never found any teacher like you through out my life,
    This lecture really helpful for me.
    Hat's off ❤

  • @Meera.k.24
    @Meera.k.24 9 месяцев назад +1

    2015 pyq, principle, voice principle ans = 20, hence none
    t or false wale ka answer is 10 , so option A
    wedding handshake = 21
    sides of polygon = 11
    1.59 ..no.. of ways of arranging a,b,c,d,e... = 12

  • @kamleshsahoo2243
    @kamleshsahoo2243 4 месяца назад +1

    Always love the way you teach Sir extremely helpful for us .. Thank You So Much Sir...🙏🏻🙏🏻

  • @sweetysaikia4414
    @sweetysaikia4414 23 дня назад +2

    Bestest bsir

  • @PriyankaVerma2001-mhi
    @PriyankaVerma2001-mhi 10 месяцев назад +4

    Actually thkuuuuu sooo much sir for this specific topic as there is no relevant video on this topic upto csat level...❤❤❤

  • @AmanBhagat-bc6zq
    @AmanBhagat-bc6zq 9 месяцев назад +2

    Wow, sir you r looking very nice..😊

  • @ShivanshKhatri-jx5bm
    @ShivanshKhatri-jx5bm 6 месяцев назад +6

    My favourite is Rishav sir and his favorite is Vaibhav 😂❤..thank u so muvh sir!!

  • @Hgrtnavu...n
    @Hgrtnavu...n 9 месяцев назад +5

    Sir you are th example of entegrity in your work . Bahut hi honest h aap. Sor this hard work thank you so much

  • @PriyaSharma.7
    @PriyaSharma.7 9 месяцев назад +2

    You made this topic very easy.. Thnk u sir❤

  • @divya2743
    @divya2743 Месяц назад +1

    A big thank you sir ❤for your efforts 😊

  • @ajaynagla6992
    @ajaynagla6992 7 месяцев назад +14

    hello sir, in practice question of 2019 (combination) triplet(x,y,z) when x=1 fourth value you have written (1,4,2) its total is 7 , correct value is (1,4,1)?

  • @ambikayadav7852
    @ambikayadav7852 10 месяцев назад +3

    Twinkle twinkle little star
    Rishav sir super Star ⭐⭐⭐⭐⭐

  • @pratimaverma1491
    @pratimaverma1491 9 месяцев назад

    mujhe formula ratne me problem hoti h. to ye samjha k padhane ka tarika, best h

  • @twinkalekhan2003
    @twinkalekhan2003 10 месяцев назад +1

    40:25 school - 360 & layout -144

    • @mohamunichakma
      @mohamunichakma 9 месяцев назад

      please explain me the Layout answer.. I am very weak in maths🙏

  • @vishalyaduvanshi2026
    @vishalyaduvanshi2026 10 месяцев назад +6

    1-360,2-144,3-12

  • @abhinayankumar3109
    @abhinayankumar3109 8 месяцев назад +1

    Sir app bahut accha padhate hoo per Thora simply way me bataye jaise flag colour wala problem use apko bolna tha ki 1st colour hai usko3 way se bhar sakte hai 4 way se bhare ge to same ho jayega adjacent site to 3 way se barege and other 1 or choose kar sakte hai koi 2 niche stripe se
    Fir 2nd colour ko 2 way se kar sakte hai fir 3 colour ko bi 2 way se kar sakte
    Chahe koi vi color hoo
    Ap bahut accha padha te ho per Thora or simple way me padhaye isme nahi ias Wale hai koi bi aspirants hai jaise hm nimcet wala

  • @snehadas1111
    @snehadas1111 6 месяцев назад +5

    hw 1 :- 360
    hw 2 :- 144
    hw 3 :- none of these ( answer is 20)
    hw 4 :- 32
    hw 5 :- 21
    hw 6 :- 11
    hw 7 :- 36
    hw 8 :- 10
    hw 9 :- 7998
    hw 10 :- 24
    hw 11 :- 945
    thanks sir... great session....

  • @Style_queen76
    @Style_queen76 6 месяцев назад +2

    Ap pehle mujhe ku nhi mile sir u r the great apki strategy byttt achi lgi padhane ka basic was so good 🥺🙏 thnqq sir

  • @Geetagujjar
    @Geetagujjar 6 месяцев назад +1

    U made it so easy to understand... I'm stunned sir ❤ thanku so much sir

  • @sagarpunwatkar5378
    @sagarpunwatkar5378 10 месяцев назад +1

    Thank you so much Rishav Sir...Really appreciate the efforts that you are taking for us... The way you explained each and every topic that was amazing... Especially this one... I was so fearful but you made it so simple and easy to understand so thanks for that...🙌🙏👍

  • @agentravi00007
    @agentravi00007 4 месяца назад +1

    excellent lecture brother 🙏

  • @nikhilmaurya13
    @nikhilmaurya13 6 месяцев назад +1

    Thank you so much Sir. I enjoyed yr class and learned a lot✌️

  • @ankitkr4583
    @ankitkr4583 10 месяцев назад +1

    bahut achhe se samjhaye sir thank you

  • @Aarav-uj4pt
    @Aarav-uj4pt 5 месяцев назад +1

    Homework question answer
    Option C(360)
    Option B(144)
    Option D(None of the above.20)
    Side question(Option C(11)

  • @Live-like-a-king-mann
    @Live-like-a-king-mann 8 месяцев назад +1

    Really Thank you 🙏

  • @Gaumay555
    @Gaumay555 10 месяцев назад +3

    Ans-360,144,,option-D,10,21,11

  • @WAYMAKER5734
    @WAYMAKER5734 6 месяцев назад +1

    sir this is very usefull video. Thank you sooo much🙏

  • @rituchandra20
    @rituchandra20 8 месяцев назад +3

    Really itna simple kisi ne kabhi nahi samjhaya hoga ye topic heads off to u sir 🎉🎉🎉😊😊😊

  • @factfire9810
    @factfire9810 Месяц назад

    Thank you for the class, Sir
    Homewok questions
    Q1. C 100 21:27
    Q2. C 360 40:08
    Q3. B 144 40:11
    Q4. B 19 1:01:21
    Q5. D none of these (17 ways) 1:33:13
    Q6. C 21 1:38:15
    Retry
    1:33:28
    1:01:21
    47:11
    21:27
    17:20
    14:14

  • @Veershekhawat1234
    @Veershekhawat1234 10 месяцев назад +1

    Sir plzz continue this & cover all the topics in CSAT

  • @-JYOTIBASWAJB
    @-JYOTIBASWAJB 10 месяцев назад +2

    Hates off , amazing teaching

  • @geetasinghla7850
    @geetasinghla7850 10 месяцев назад

    Thanku so much sir. Maine 2-3jgha se ye topic samjhne ki koshish ki but mujhse questions solve ni ho pa rhe the kyuki concepts hi smjh ni a rhe the but apne is topic ko itni asaani se smjha diaaaa. Thanku so much sir

  • @lilykumari1593
    @lilykumari1593 2 месяца назад +1

    Everything is temporary but vaibhav and Ankit favourite name of sir is permanent. 😂

  • @riyathakur4601
    @riyathakur4601 6 месяцев назад

    You're teaching methods are wonderful, sir.

  • @Learnify1995
    @Learnify1995 10 месяцев назад +3

    1.C
    2.B

  • @commitmentisthekeytosucces9863
    @commitmentisthekeytosucces9863 6 месяцев назад

    1:33 hr. ans- (d) none of the above.... bcz actual answer is 20..... and not given in option.... thanks sir
    1:33:35 hr answer (d) 32
    1:38:22 hr ans- (c) 21
    1:52:59 hr ans- (d) 12

  • @binaykumarm4029
    @binaykumarm4029 7 месяцев назад +1

    Thank you rishav sir for bringing out best in ourselves , we are lucky to have you sir 🙏 ❤️ 🎉 ,

  • @mirachavan3809
    @mirachavan3809 9 месяцев назад

    Having full respect , 1:10:30 correction ...ans 9 bcz in first line last option total 7 ...... Thank u so much sir...😊

    • @rishavsharma1459
      @rishavsharma1459 9 месяцев назад +1

      Answer 10 hi hai....
      It is 1,4,1 - by mistake wrote it wrong but explanation is right....

    • @mirachavan3809
      @mirachavan3809 9 месяцев назад

      ​@@rishavsharma1459 Okay sir..Thank u❤ I will correct in the notebook🌝

  • @dominicbhai-gaming8847
    @dominicbhai-gaming8847 10 месяцев назад +1

    Good evening sir
    Answer 1. C- 360
    Answer 2. B- 144.

  • @user-up3qq4mhk
    @user-up3qq4mhk 4 месяца назад

    Thank you dear sir nice class

  • @nidhiyadav-mi4qp
    @nidhiyadav-mi4qp 8 месяцев назад

    1:52:54 number of side of polygon is 11

  • @SonuPradhan8414
    @SonuPradhan8414 6 месяцев назад +1

    PQ-2015
    Ans->(d)none of the above

  • @Lord_Dalhousie.
    @Lord_Dalhousie. 6 месяцев назад

    1:33:10
    Answer D - NOTA
    20 combination possible

  • @MithileshShukla-yq9rz
    @MithileshShukla-yq9rz 6 месяцев назад +1

    1 .360
    2. 144
    3 . 12 ways principal and vice president choose
    Homework questions
    4 21 handshake
    5. 11 sides of quadrilateral

  • @avsgroup8507
    @avsgroup8507 9 месяцев назад

    Task assigned type ques.
    Principal and vice principal - ans= none of the above
    True/ false- ans=32

    • @nehatewatia4525
      @nehatewatia4525 7 месяцев назад

      can u please explain the true false ques???

  • @familymoments1040
    @familymoments1040 7 месяцев назад +1

    Best pc video on youtube

  • @saumyatiwari9459
    @saumyatiwari9459 10 месяцев назад +2

    Thanks a.ot 😊 sir for this session 😊

  • @rts8639
    @rts8639 6 месяцев назад

    21:42 B. 18
    39:59 C. 360
    40:11 B. 144
    1:32:54 B. 12
    1:33:24
    1:38:13 C. 21
    1:52:54 C. 11

  • @pkggamer.1204
    @pkggamer.1204 6 месяцев назад

    Great method of teaching thanks 🙏🙏 sir

  • @SUMANKUMARI-gg2oj
    @SUMANKUMARI-gg2oj 10 месяцев назад +1

    ❤❤❤ fantastic session 😊

  • @RitikaGusaiwal
    @RitikaGusaiwal 7 месяцев назад

    This is an amazing lecture. Thank you sir

  • @targetupsc5911
    @targetupsc5911 6 месяцев назад

    Thanks a lot sir ….Hats off to your dedication

  • @ThekingintheNorthhh
    @ThekingintheNorthhh 6 месяцев назад

    Nice video.... thankyou so much sir

  • @amartripathi6985
    @amartripathi6985 9 месяцев назад

    Thank u so much dear sir for this lecture.... Thanks alot...

  • @sagarpraveen-n6z
    @sagarpraveen-n6z 7 месяцев назад

    1:33:24 option d, 32

  • @StudyOnly-ok8ot
    @StudyOnly-ok8ot 6 месяцев назад

    Thank u so much sir...v. unique way of teaching...u mk things so simple n easy for us❤😊

  • @Rasmi-i4s
    @Rasmi-i4s 10 месяцев назад +2

    My fvrt❤

  • @MirMubashir-p2s
    @MirMubashir-p2s 6 месяцев назад

    Thnku so much sir very helpful.. grateful sir!❤

  • @meerachodhri1259
    @meerachodhri1259 8 месяцев назад

    Sir classes se achi mujhe ye RUclips video lgi

  • @sagarpraveen-n6z
    @sagarpraveen-n6z 7 месяцев назад

    1:33:02 20 combinations. None of the above

  • @Phoenix-zj2wb
    @Phoenix-zj2wb 8 месяцев назад

    41:10 combination

  • @sagarpraveen-n6z
    @sagarpraveen-n6z 7 месяцев назад

    1:52:53 option C, 11

  • @DeepakChauhan-yp3kq
    @DeepakChauhan-yp3kq 2 месяца назад +2

    Sir hrr lecture mee Vaibhav koo jrur yad krte hai 😂
    Lgta hai sir ka dost hai 😅😊

  • @razaali386
    @razaali386 8 месяцев назад +1

    1:11 9 possible value

  • @blooming_gallery
    @blooming_gallery 7 месяцев назад +1

    This is very helpful. Please post the lecture of other important quant chapters.....❤

  • @sharmauday007
    @sharmauday007 7 месяцев назад +3

    1:09:00 sir (1,4,2) nhi (1,4,1) banega ...otherwise sum got 7

  • @shantikeshwala819
    @shantikeshwala819 9 месяцев назад

    Really helpful 👌 ❤

  • @smritisingh6991
    @smritisingh6991 7 месяцев назад

    40:09 C) 360
    40:14 B) 144

  • @awanishsharma7157
    @awanishsharma7157 10 месяцев назад +1

    Thank you so much sir🙏

  • @Samraha-rt8wu
    @Samraha-rt8wu 10 месяцев назад

    Thank you so much sir amazing session 👍👍

  • @sahais2012
    @sahais2012 8 месяцев назад

    Please solve
    A team of two people has to be sent from a
    company to give a presentation to the client.
    There are five potential employees who can go
    for the presentation. Sunita will go for the
    presentation only if Rajesh does not go for the
    presentation. What is the different number of
    possible teams that can be selected for the
    presentation?
    (a) 9
    (b) 19
    (c) 10
    (d) 11

    • @ReallyNig
      @ReallyNig 8 месяцев назад

      I'm getting 15... 🤔🤔. Are you sure about the options?

    • @Shruti-ls6fm
      @Shruti-ls6fm 6 месяцев назад

      I am getting 9

    • @sahais2012
      @sahais2012 6 месяцев назад

      @@Shruti-ls6fm how?

    • @Shruti-ls6fm
      @Shruti-ls6fm 6 месяцев назад

      @@sahais2012 leave Sunita we have 4 people and 2 has to be selected
      4C2=6
      and Sunita can go will rest 3 except Rajesh so 3 cases here
      Add 6+3=9
      What's the answer??
      Am I right??

    • @sahais2012
      @sahais2012 6 месяцев назад

      @@Shruti-ls6fm yes you are!!

  • @Shruti-ls6fm
    @Shruti-ls6fm 6 месяцев назад

    40:27
    school:360
    Layout--144

  • @gungungupta7765
    @gungungupta7765 10 месяцев назад +1

    26:15 ans 100

  • @Mithlesh.
    @Mithlesh. 7 месяцев назад

    46:00
    50:00 currency problem

  • @Live-like-a-king-mann
    @Live-like-a-king-mann 8 месяцев назад

    Really Thank you Sir