Permutations and Combinations - Shortest Paths | Don't Memorise | GMAT/CAT/Bank PO/SSC CGL

[@InfinityLearn_NEET]

DidYouKnow: Factorial of any negative quantity is not valid. ✅To access all videos related to Permutations and Combinations, enroll in our full course now: infinitylearn.com/cbse-fullcourse?KZbin&DME&NaAU0iPk To watch more Permutations and Combinations videos, click here: bit.ly/PermutationsCombinationsVideos_DMYT

[@someone-xp8ii]

why?

[@harshit7957]

Have had ha

[@laxmikesarwani5368]

In the question finding number of shortest path I do not get it that why you have not taken the diagonal path of that rectangle

[@laxmikesarwani5368]

And also to inform you that everyone is not so privileged so it will be very great help if you ... make a available free videos of many questions related to this topic

[@skibidisigmanani]

@@laxmikesarwani5368 because there is no diagonal path.

[@Lakshaymehta01]

Watched all the 15 videos straight, the concept is clear! Thanks :)

[@raiyanishmam2778]

Am I too late here to thank you for this WONDERFUL playlist? So here's a bit of my gratitude- I understood it pretty well today, how you can learn something so easily if you have the write tutor to learn you those lessons! Your videos were dissected in a way that anyone can understand thoroughly. The presentation was also excellent. I wish you all the best.

[@kunalkumar-hl6gv]

THIS IS THE BEST PLAYLIST FOR PERMUTATIONA AND COMBINATION , I M DATA ANALYST NOW I M SWITCHING MY JOB SO I WAS TRYING DSA QUESTIONS AND I COUDNT ABLE TO THINK ALL THE PERMUTATION BUT AFTER THIS I SMOKED AL THE QUESTIONS

[@henok.l4202]

Here i am in 2024, great video🎉

[@mlm6811]

For those who did not understand why she takes 9C5 or 9C4, think of it like this: As she explains, the shortest path should consist of 5 Right and 4 Up steps. So one of the simplest shortest path will be: R R R R R U U U U. Then based on her previous explanations, we need to identify in how many ways can we order these ( similar to ANAGRAMS problem). So we have 9 items with 5 Rs and 4Us. That gives us, 9!/(5!*4!). This in turn is equal to 9C5 as well as 9C4. Hope this helps. For the presenter - THANK YOU VERY MUCH! These will be really useful for my students :)

[@dkine5586]

💓

[@_curiosity...8731]

When we go through the ANAGRAMS way, we follow Permutations. But here we are selecting path so ideally we should follow Combinations. Please correct me if I am wrong.

[@skydivenext]

@@_curiosity...8731 combination is a form of permutation not per se but you just divide by more numbers

[@5umitpandey]

Full marks for Voice, Presentation, Animation, Quality, And Examples. Just Perfect ❤

[@InfinityLearn_NEET]

Thank you very much for the appreciation and for watching Sumit. :)

[@sharifanisuzzaman2772]

I didnot understand permutation and combination.Your approach makes me to understand cleary.These videos are so much effective.

[@InfinityLearn_NEET]

+Sharif Anisuzzaman Awesome! Your comment made us happy :)

[@sameerEdu]

i completed this whole playlist in a quick shot! Just loved to see it and I understood everything in 2 hours, hats off to you!

[@much_tunsia]

2 hours ago,,, samee

[@RamyaRPai]

Thanks a lot ...these type of videos is exactly what i was searching for...watched all the 15 videos...great voice and presentation...Just got confused with the last video diagram ;)...it looks like 6 and 5 ...columns and rows... One more thing is why exactly do we divide i couldnot imagine and visualize...But videos are very helpful to solve any type of problem on this topic ...Thanks a ton ...great work...thank you so so much :) :D

[@InfinityLearn_NEET]

Thank you Ramya! We've pinned your comment :) To access all PnC videos(24 videos) for free, visit our website here: dontmemorise.com/course/view.php?id=92 Happy Learning :)

[@vishakhasarang3447]

Page not found 🥺 can you please attach updated link ?

[@Raseed-oe2cy]

@@vishakhasarang3447 yeah your right!!!! even im also waiting for those videos,.

[@amanmonty2271]

they didnt pin ur comment lol

[@aashsyed1277]

@@InfinityLearn_NEET NO IT IS NOT PINNED!

[@songthangsongate7525]

You are the best mathematics teacher in this world.whenever i had any doubt in maths,i always into your channel❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤

[@attitudekilleroriginal]

I have viewed and liked all 15 videos. I'm pretty weak at mathematics and this was simple and amazing, really helping a lot for my GRE preparation. Thank you so much!

[@InfinityLearn_NEET]

That's great :) Have you visited our website DontMemorise.com?

[@rohitgope4800]

Thanks!

[@NidusFormicarum]

I solved it in another way. She reaches her destination either from the left or from below. This mean that there is 1 possibility only from each one of these points. We can write a 1 at each of them. When we add them we get 2 in the corner opposite to the end-destination. There are 2 possible ways she can take from here. From the right-most, down-most corner there is only 1 possible way. Thus, this applies for the squares above as well, since turning left would be a longer path. We write 1:s at these points. The same applies from the upper-most, left-most corner. Now we just add the rest of them: 1+2=3, 1+3=4, 3+3=6 etc. The numbers are the total number of possible ways from each particular point. We get the units, the natural numbers, the triangular numbers etc. known from Pascal's triangle. In the left-most, down-most corner we get the sum 126, which is the correct answer. This sum can be calculated with the formula (n+m-1)!/((m!(n-1)!), where m is the number row in Pascal's triangle and n stands for the n:th number in the series. (5+5-1)!/((5!)(5-1)!)=126

[@sophiama1509]

I watched all 15 videos on this playlist and went from being SO confused about Permutation & Combination to having such a clear sense of the concept --through your 15 videos!!!! It's so amazing and THANK YOU THANK YOU THANK YOU!!!!!

[@Ammu71215]

completed a total of 15 videos,,u made it very easy ..and my doubts are well cleared ..thank you for the valuable classes

[@basanghimire8119]

How can a person be the teacher, the youtuber, an editor, the psychologist, and the life saver? Here I am - the like Liker, Subscriber, skipper, volume manager of this channel.

[@mimimaisarah3517]

Thankss a lot❤️❤️❤️❤️you’ve save my life.Its easy to understand when you teach one by one as a slow learner as me🤍🤍

[@sasswithdivyanshi]

you made it simple like the addition of two with two. I'm so astounded by your lucrative delivery. Thank you so much.

[@abhilashakalal9548]

Thank you so much! We have our Maths test tomorrow and your playlist helped me a lot. Thank you for these videos and thank you for compiling them in a playlist as well!

[@shalinitiwari4709]

The best channel to study. I would recommend this to everyone. I watched the whole playlist. Pretty easy to understand. Thank You so much.

[@Karan-pz4rk]

Literally, watched the entire playlist In A one go, never knew mathematics was this interesting !

[@rajeshwarivk8253]

I saw all ur 15 videos just 3 hrs before my exam... These r just amazing and topics are crystal clear.... Thank you so much ..... Now I'm going to give exam....

[@muskanvarshney287]

Hats Off! to the efforts made! Love the videos! Love the idea of "Don't Memorise ". Also, a little suggestion - Please add few questions to test our learning!

[@manavbatta8865]

After a long time, someone gave preference to understanding logic than remembering tricks.Thanks you ,Thankyou very much.Literally Thanks.

[@smitachoudhury9386]

Thanks for the video. Nicely explained. Cleared my concept

[@venkatmanohar3747]

I have watched all the 15 videos and I am glad that all of my doubts got cleared. I liked your way of explaining the concepts. Thank you so much for making such useful videos.

[@hamSo47]

The last line "make sure that you understand the concept well" Wow

[@khushi.nandwani]

this is honestly the best educational content available! Thank you :)

[@subhankari3739]

I got this playlist after wasting my 2 yrs 😭 Tq so much for such a beautiful creation n' teaching as well...

[@Rashmi-r5c]

I don't know how to thank you enough..I was feeling so bad because I couldn't understand permutations and combinations.But now I'm totally clear❤️❤️❤️

[@v2sisters138]

i binged all 15 videos and i love them, i feel more confident in PnC now, THANK YOU SO MUCH.

[@InfinityLearn_NEET]

Hi, We are very happy to hear that. To view more videos for free, register on our website: bit.ly/DontMemoriseRegister. :)

[@nithishkumarreddy5219]

i had seen all the 15 videos and all the videos are marvelous , i had seen that you people did not compromise in explaining the concepts keenly and you also stick to the basic levels which is necessary to understand pnc and i assure you that any beginner can understand pnc concepts after watching your videos THANKS A LOT FOR MAKING THESE VIDEOS

[@bangtanworld9011]

Simply Amazing!!!Woahhhh!!!!❤❤❤❤

[@JOY-nl1ld]

I went through the complete playlist and every detail is covered in a short rather very effective way...Thank You so much...💖

[@gauthamgtg]

Best Lesson ever.. Not going to memorize anything anymore than you so much..

[@rohitroushan6925]

Your videos are sooo easy to understand ♥️

[@tothepoint7898]

It may be useful for someone to understand.. For the shortest path as we calculated we need to travel 9 steps and out of these 9 , 5 Should be right and 4 should be up. So using formula we can use it in 2 ways. (i) First no of ways we can select right and than no of ways we can select up. 9C5 X 4C4 => 9C5 (as 4C4 is anyway 1.) ==> first no of ways from 9 steps select 5 right and after that as only 4 steps are renaming and we need to select 4 up so 4C4. (ii) First no of ways we can select up and than no of ways we can select right. Explanation same as (i) 9C4 X 5C5 as 5C5 is 1 so total = 9C4

[@Thanos-hp1mw]

This was better than the video

[@yogeshbharadwaj6200]

Thanks a lot for the great playlist....Now i understand the logic behind the formulas...As per the channel name, you are making us to understand the core concept and not to memorise at all....Tks once again....

[@rishabh3920]

thanks a ton. Watched all the 15 videos. helped me to strengthen my concepts and helped me in competitive exams too. A very good channel subscribed liked and shared.

[@InfinityLearn_NEET]

Thank you for your comment Rishabh! To access more videos for free, visit our website here: dontmemorise.com/course/view.php?id=92 Happy Learning :)

[@rajveersinghwadhwa2973]

Watched the complete playlist , the content was on point and now I'm confident on solving questions from this topic.

[@thiruvarppugramapanchayath4400]

never seen a video like these before and you are an awesome teacher

[@niharikasondhi9164]

Unique way of teaching in all your videos I have watched till now 👍👍

[@ram123krk]

Wooowwwww Wooooowww This is what exactly a student should get. Students are fortunate.

[@bismahjunaid1903]

waoooo ...seriously....amazingly explained watched all videos on permutation and combination concept

[@FervidlyCurious]

watched each and every video. This whole approach was beautiful and easy. I am preparing for CAT. so basics will help in Quant. I hope you have all the quant topics covered. great work ! *superlikes* :)

[@InfinityLearn_NEET]

Yes, these videos will help you with your Quant Basics. We haven't uploaded all the videos on KZbin. To view ALL the videos related to Quant, we would suggest you visit DontMemorise.com. You will find all videos in the GMAT section. And don't worry, its available for free on the website as well :)

[@Prerana2121]

@@InfinityLearn_NEET It is not free anymore it seems :( on your website

[@rajarshimajumder6659]

We can also use the method where we use no of ways to reach the corner point and add up till we reach upper right corner. I guess you know the method i am hinting. Thanks the explanation was brilliant, and not to mention the voice :)!

[@venkateshkota8693]

Why we don't multiply 9C5 with 9C4? To reach destination, it has to travel both UP & Right, but why are suggesting to take either UP or Right?

[@sanskaraswani9155]

Same doubt

[@seselis1]

If you go "Up" and arrange 4 ways out of 9 to do so, you already consider the 5 left options of going "Right". It means that whenever you seek a different path of going up, you automatically have to go "Right". Generally, you would need to multiply those two, but not in case of 9C4*9C5, because here the number 9 means 4 "Ups" and 5 "Rights" in the shortest path ITSELF, and not all the possible "Ups" and "Rights" across the WHOLE MAP. It would be hard to count all the possible "Ups" and "Rights" because of certain circumstances. For example, if you instantly went 5 blocks right, there would be 4 "Ups" left (that would imply 1 option), whereas if you firstly went 1 block right you'd still have 4 "Ups" left to cover (but you'd have more options to do so). Thus, the 'C' formula would be different (tbh it wouldn't even be the 'C' formula)

[@Prerana2121]

@@seselis1 Amazing explaination! Thank you for taking out time to explain this. Really appreciate it :)

[@typingmaster10typingmaster26]

Nothing is better than u mam

[@krishkushwa6595]

I just loved this video series of this chapter 😍😍 Tysm 🥰

[@Prashant51424]

finally watched all your video . really all videos are addictive and full of concept . thanks very much

[@MuhammadAslam-sj3nf]

amazing lectures that I have understand the concept easily which I was not able to understand even watching 100 of videos from utube thank u so much

[@meenav413]

Awesome videos. I watched all 15 of them. I have been searching for videos in this topic. This is the best I found. Hats off to your work. Amazing explanations. Thank you so much. Even paid videos are not as good as these.

[@ivanramirezmejia8225]

This is the best content about permutations and combinations I have found on the internet. I am from Mexico and I want to continue with more intermediate and advanced topics about it ¿Do you have more material to provide? No problem if I have to pay. Thank you for your efforts ❤

[@sarahmaria4334]

Permutation and combinations is one of my difficult chapter and I used to skip this chapter...but after seeing all your 15 videos help me to study this chapter...very well...and all your videos making me to handle this chapter so logically and easily...

[@InfinityLearn_NEET]

It's my pleasure Sarah. We are glad that you understood the concept. We are happy that we could help you learn. For more videos, please visit our website - dontmemorise.com/

[@urvinderkaur6642]

Excellent Videos! But I do have a small doubt. In the last video, if I take the first approach and as per the common English, the girl has to travel 5 steps - RIGHT and 4 steps UP to get those candies, which is for me 9C5 * 9C4 right? How can you consider only one direction? But the same problem with anagram logic makes sense. Can you pls help me in considering the first method?

[@natarajanparameswaran6752]

A hundred years to you all. Helped me understand clearly.

[@aieshaayaanahamid7106]

Thank you so much! This series is a life saviour..

[@hamSo47]

Discovered it just today.😍

[@is-hakthani4258]

Now I understand clearly permutation and combination 😀😀😀😀😀😀

[@aaryan__bondekar9778]

Wow!!! Really intriguing. I was bored and intimidated by this lesson initially, but after watching all 15 videos, i loved it! Thank You Sooo much

[@InfinityLearn_NEET]

You're most welcome Aaryan. We are glad that you understood the concept. We are happy that we could help you learn. Do support us by subscribing to our channel. 👍👍

[@Sankalpmeshram143]

permutations and combinations was not as easy as it is now... awesome concept.. thanks

[@InfinityLearn_NEET]

+sankalp meshram, thank you so much for your feedback :)

[@radhasmakeupartistnamakkal4223]

I watch all your videos. It's easy to understand the chapter.

[@jithinbabu6902]

wow.. seriously. U just gave me a new perception.really appreciate this. thanx a lot.v really need tutors like u

[@InfinityLearn_NEET]

You're welcome Jithin. To view all videos based on PnC, please visit our website here: dontmemorise.com/course/view.php?id=92 Don't Memorise, Know More :)

[@shruthiraguram4589]

Loved watching this series! It helped understand the concepts so well and I will not forget them now!Thank you!

[@iammayurn]

Thanks for describing the three ways, I was wondering this for long how we getting this answer with so many ways.

[@SAKSHISHARMA-qc4lx]

Thankyou so much for such an amazing explanations.. with so clear visualisation.. I watched all the 15 videos and the topic became crystal clear to me... I was looking for sauch concept clearing videos with least duration. Those longer videos of about 1 hour are so annoying.. Thankyou so much once again✨✨✨

[@15_gaikwad_omkar12]

thank you so much... you are amazing... now I am pro in counting.

[@harsh__tube]

Finally all videos are completed...and this helps me a lot

[@InfinityLearn_NEET]

I'm glad to hear that. To view all videos for free, register on our website: bit.ly/DontMemoriseRegister Happy Learning :)

[@anmjubaer]

I enjoyed and understood the basic concepts of C and P. Thanks.

[@ciltire420]

i cant explain how much u helpe me thanks i did my home work for the sake of ur deeplthly understinding me ur hoem work

[@deenagupta9056]

This is the best video ..nice explanations , solved examples and video..... thankuuuu so much Please make this type of videos for all the chapters

[@MegaDeepak56]

you did really hardwork!!! your hardwork is very much appreciable!!! I liked your all videos one by one after watching all the series of P&C!!!

[@InfinityLearn_NEET]

That's great to hear Deepak :)

[@limario1920]

thank you so much for these videos. you explained them in a way that i could easily grasp and i'm really grateful! much love 💕

[@sachio5625]

Thank you for this!! This is very helpful! I love your approach, you don't explain the formulas, you make people understand first all of the concepts logically which i think is more important. Thank you for the vids!

[@jansherynacosta3947]

the best video lesson I've ever watched! thanks ma'am!

[@anandananand7869]

I see all the 15 it's very easy to understand thank you for uploading these videos and upload more as like this thank you so so much 😘😘😘😘

[@Mazakiin]

thank you SO MUCH I passed the + all thanks to you!!!!!!!!!!!!!!!!!!!!!!!!!!!!11

[@ishwarbonde6497]

I deeply engrossed in ur videos thx very much Best teaching

[@MrMekato]

I subscribed because of the great voice and videos. helpful content. thanks

[@InfinityLearn_NEET]

Thank you so much Mekato! Happy Learning :)

[@AlwaysHopeful87]

Agreed!

[@suhanijain3681]

These videos have helped me not just learning but also clearing the concept of permutation and combination. thank you :)

[@InfinityLearn_NEET]

+Suhani Jain , great to hear that. Don't forget to subscribe to our KZbin channel to stay updated :)

[@nishanthchandrashekar1413]

Really what a crystal clear explanation, you guys are really doing amazing job. I hope you will bring much more concepts so every body can learn the maths in a very intuitive way. Hats off to the presentation you have made its splendid.

[@monroethomasclewis1459]

Your efforts are crowned with success, brilliant success.

[@IndranilRoy13]

Thank you !!! I had always feared this subject,but i hope now i have gained some confidence for it !

[@InfinityLearn_NEET]

+Indranil Roy , that's good to hear. Keep learning :)

[@ROHITKUMAR-hh8gr]

ur lesson is helping the gate aspirants as well.just u guys playing with the concept great.keep uploading videos.

[@InfinityLearn_NEET]

+ROHIT KUMAR , oh really? We'd not realised that. Happy to hear. Keep learning :)

[@worldwibeweb7133]

Amazingly.....I...finally...finished......this...chapter....Thank..you......very very much.....

[@InfinityLearn_NEET]

Thank you Pravin. To view all videos based on PnC, please visit our website here: dontmemorise.com/course/view.php?id=92 It has quizzes too. Please register on our website DontMemorise.com to stay updated :)

[@dreamcatcher9638]

THANKYOU SO MUCH ,THIS SERIES IS A LIFE SAVIOUR..I WAS TOO AFRAID OF IT..BUT YOU MADE ME UNDERSTAND IT VERY EASILY AND LOGICALLY

[@InfinityLearn_NEET]

You're most welcome. We are glad that you understood the concept. We are happy that we could help you learn. Do support us by subscribing to our channel. 👍👍

[@ruwansri6544]

Excellent demonstration, wonderful narration. Watched the complete playlist!

[@vr02]

God bless u all....great work guys😇

[@AmritSahanisitunamrit]

Quite a useful website and has explained the details of the concept of many questions in various practical ways

[@prathmeshranpura]

lovely voice with lovely method of teaching. keep uploading more chapters of quant.

[@InfinityLearn_NEET]

+Prathmesh Ranpura , yes we will continue to upload more videos. To know more and to view the entire list of videos, visit DontMemorise.com. Thank you :)

[@god_37]

Thank you mam. This topic is so easy to learn I gaurantee that everyone can learn this

[@shuvrochandradas]

What a course! Hats off!

[@snehasathe5998]

Thank you very much for this wonderful playlist!

[@theminingheroshow5006]

Thank you for clarifying my doubts on this lesson, I cannot thank you guys enough for your efforts ♥️

[@anshumansingh1136]

Finally completed whole playlist ❤️

[@rudrakshjhalani1681]

Great great great explanation!! Thank you so much for this series, finally cleared all my doubts. I would now probably never forget these concepts!! Thank you once again!

[@karunameena1345]

I have a question, you see while solving using combinations, shouldn't we multiply 9C5 and 9C4, since we shall be using both the paths.

[@kajalesanjay4119]

Karuna Meena same doubt

[@MinHanhLee]

I think it's already accounted for. Since if there are 5 units to go right out of 9 units, and we can only go right or up for the shortest paths, there should be 9-5=4 units to go up within 9C5 already. Same with 9C4.

[@raji_fairy]

I'm also having the same doubt

[@sabiqsabry]

hey i might be late here but anyways... ; since there are 9 units as the shortest route we use this value and take the combination of 4 units (width) or 5 units (length) and take either value and get the amount of the shortest route that can be taken to reach the gift shop..

[@Agent58Rex]

Think of it like this way, there are nine units so total combination is 9!. But only five of them are in the right. So the 4 units, that are upwards, are not filled in the empty space of right so we divide it by 4!. Also, the order of the 5 units in the right doesn't matter so we divide by 5!. So it becomes computation as 9C5 =9! / (5!.4!)=9! / { 5!.(9-5)! } Even after this, if you didn't get it then use the logical method explained afterwards in the video to solve it.

[@monoman4083]

Really helped me, thanks..

[@stevendumeng5985]

This was so clear !!! THANK YOU 😊

[@InfinityLearn_NEET]

You are most welcome, Steven! Thanks and Keep watching 🙂🙂

[@ashutoshkarn9221]

Awesome...permutation and combination chapter was never easy for me ...but IT IS EASY NOW ....

[@InfinityLearn_NEET]

Thank you Ashutosh :)

[@jothiram4218]

really helping & i request you to post the summary video of each topic so that one can review the topics on the day before examination