FACTORIALS and PERMUTATIONS - DISCRETE MATHEMATICS

Today we introduce factorials, permutations, and permutations without repetition. We also do a few practice problems.
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Discrete Mathematics 1: • Discrete Math (Sets, L...
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Hello, welcome to TheTrevTutor. I'm here to help you learn your college courses in an easy, efficient manner. If you like what you see, feel free to subscribe and follow me for updates. If you have any questions, leave them below. I try to answer as many questions as possible. If something isn't quite clear or needs more explanation, I can easily make additional videos to satisfy your need for knowledge and understanding.

[@rajwaidyaratne4121]

I've taken many STATS, MATH, DISCRETE STRUCTURES courses throughout university and I can say without doubt you are the only person that could explain such a fundamental concept like permutations so flawlessly. You're the best.

[@yewyewxd]

AGREE

[@Forkythechanter]

Lecture is boring lol I love going on my own pace.

[@codegirl2069]

this is a high school material though!

[@blackowlgamer5078]

... Did i actually understand it? No wait I did understand it. *the teacher in our university never explained it this good*

[@tahliadelamare8315]

Im studying Computer Science at univeristy. My professor said: search "x" book in the library, copy notes, and do assignments... that's all he's really done. You make this topic so much easier to understand than a 4 inch thick book can!

[@diend92]

Holy moly, how is it that a teacher that lectures for an hour, makes it so hard to understand anything, but you are able to make me understand it in 15 minutes?! Thank you so much for these videos!!

[@ua2894]

maybe you should focus more on the lesson and not the exposed thighs of the chick sitting next to you

[@mahdimoradkhani6610]

You make discrete maths seem much more intuitive than it previously did for a calculus oriented person like me. Keep up the good work Trev!

[@toomuchtruth]

This is amazing. Learning this stuff feels almost like learning a magic trick. Thanks alot!

[@KartiKKaushiKYt]

I just want to take a momment and appreciate you and your videos. These videos have helped me a lot with my discrete math unit at uni. Thank you!

[@user-ci7qr9ix9g]

You are really a good teacher

[@davidmuwowojr9043]

This channel is like an Easter egg waiting to be discovered , thanks a lot. For the first time I enjoyed learning math , this guy deserves a medal.

[@Nicole_brume]

The fact that I am replying so close to Easter .This might just be Easter egg

[@Vlad-qr5sf]

so clearly explained, thank you

[@sgracem2863]

This is actually amazing. Sometimes I feel stupid because I can't understand my university professor and then I find something like this that I can understand perfectly! So frustrating!

[@olicon9]

You're the man Trev!!

Thank you, I would have been lost without these clear and well-communicated simple explanations. My professor just reads out proofs, without actually explaining them in such simple terms.

[@thelonearchitect]

You and Khan are really awesome at teaching such things in a truly intuitive way. That's what missing in university.

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im subscribed to both of them

[@turjosarker2892]

Flawless explanation. I wish all tutors could explain like this.

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how.....how am i understanding this after paying so much to my collage and not understanding anything why are you so good at teaching sir im subbing to you and thank you for spreading your knowledge.

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This is the best method I have seen. Thank you so much

[@mandeepkafle8045]

Trev you made me think was this so easy.Great explanation.

[@THANOS-kq1eh]

Brooo u just made me understand everything within 15 mins damnnn

[@jennyggf3556]

You made it very simple thank you so much

[@nadiavnn]

So helpful. Thanks a lot.

[@sultanalfaqir5210]

Good to see you back

[@ripjaw678]

Thank you so much for you videos. They’ve been a massive help in my understanding discrete math while I have to learn online due to COVID-19

[@II_xD_II]

im learning more during covid rather than wasting my time at school

[@ems8578]

@@II_xD_II same HAHA.

[@adarshnathaniel8520]

Wow I love ur videos soo much. Thanks for the magical trick 😁

[@andrewcekuta8627]

these videos are very well done

[@KunoAsagi]

Holy, I did not expect to be able to understand a maths video without having to repeat the video

[@TheConqueror009]

I'm taking remedial Algebra 1 and 2 in community college right now and this is fascinating to me.

[@zahidulhassan7033]

the last example was freaakin awesome !!!

[@suleymanrahimov]

Legend is back.

[@aliasgar1648]

Loved the path finding example. This could be a much faster solution than backtracking(given the same constraints) for programming problems.

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Yeah you are right, 👍🏻

[@GuruTheCoder]

i thought the same

[@ikaymon9224]

11:00 a parabolic SAR Indicator above "MISSISSIPPI"

[@sallaklamhayyen9876]

thank you

[@walkorion2977]

thank you my brother

[@hexodian]

life saving knowledge

[@blastinnn]

super helpful video, respect!😎

[@walkorion2977]

@@hexodian yes bro especially in this moment of crisis

[@pawanmehra5172]

nice efferts

[@albaybektas]

when we did that in R^3 anything change? example (0,0,0) to (8,10,12)?

[@Intothefirenow]

So just to understand the path finding problem, you find the permutations of the string representing the movements, but then you use the division rule to divide by the number of ways, or paths, that are equivalent. What you're dividing by is a result of the product rule which implies that if I have n! ways of rearranging the right movements and m! ways of rearranging the down movements, then I have n! * m! total ways of rearranging the string and it being equivalent?

[@s3m3dov]

Though I used permutations a lot, I really haven't understood the logic behind this till now. (Rule of Product -> Permutations)

[@WhataaBeAsT]

Anyone else think his name was "TrevTheTutor" not "TheTrevTutor" this whole time

[@mattslatt4025]

guess not

[@II_xD_II]

never thought bout that tho stop watching Peppa pig

[@jessm1743]

i've had less than four math 12 classes and we're already discussing permutations and factorials. it remains yet to be seen whether i'll survive the year lol

[@WhiskeredBope]

These videos💎💍🎩👑

[@armcska582]

On the question What if the first three numbers in the list must be even? Isn't the answer 3x2x1(assuming there are no repeating) x 7x6x5x4(it's never said that the other elements cannot be even).

[@azmeyleen8098]

There is the restriction from the first condition that the elements can not be repeated.

[@usmanshahzad8310]

Why we multiply 4factorial and 3factorial . Why not we use add

[@sgc603]

A lucky number is a 10-based number, which has at least a "6" or an "8" in its digits. However, if it has "6" and "8" at the same time, then the number is NOT lucky. For example, "16", "38", "666" are lucky numbers, while "234" , "687" are not. Now we want to know how many lucky numbers (without leading zeroes) are there between L and R, inclusive?

[@lilsafmusic]

Video series on software verification?

[@II_xD_II]

your request was so hard that I left a comment without any reason lol

[@bmxguy418]

8:34 he's speaking chinese

[@aedanmckee8698]

Yes

[@mustafamalik4211]

Did he just pronounce ERR as AIR?

[@thedude1947]

I'm in PAIN

[@NF-Alpha]

I dont even understand at all