Permutations and Combinations 14 ( The 'GAPS' Concept) | CAT 2024

Permutations and Combinations by Ravi Prakash | Quantitative Aptitude for CAT 2024

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[dub-lus]

I can say for sure that Ravi Sir is the best when it comes to Quant. Proper explanation, pace, tricks and methods, everything is perfect. Best Quant teacher for sure.

[shreyachawla]

Wish I had started seeing your videos earlier, they're just awesome!

[binnapaul]

So for anyone who is looking for this - there are 22 (numbering vise) p&c concept videos. Video 9 is not missing it was just a numbering mistake. Video 13 has been uploaded twice but there is video 12 and 14, etc.

[vins]

BAT's are always troubling. Either it be CAT or Corona 😭

[Abhishek-yekq]

who did watch starting part again and again to get the cocept and still not get it???

[renukumar]

Sir thank you so much for clearing all our concepts.

[lokeshagarwal]

Here bats are distinct, so how can we use similar to distinct shortcut?

[AbhayBhadoriya]

At first, i couldn't understand the question then i realized that question meant to say that there are atleast 2 bats in b/w of two selected bats

[nakulkaushal]

14:50 why is this question A & G are 0 natural no' start from 1 then?

[suyashjain]

Sir the bats are distinct, how can you justify S to D here?

[anshul]

Sir, just have small a doubt in 2nd question of this gap concept. Please revert whenever you can. Shouldn't any one of the gaps amongst B, C, D, E & F be >= 1 and the rest can be >= 0 in order to make the set of 6 no.s non-consecutive like (1, 3, 4, 5, 6, 7). And if that will be the case then, >=1(B) + >=0(C) + >=0(D) + >=0(E) + >=0(F). And this can be done in 5 ways, i.e., 5!/4!. So. the final answer should be 5*(48C6) ways.

For, the last question it is correct as the question has asked that no 2 stations can be consecutive.

[Dinesh__Jandagudem_]

Sir can't we arrange 7 bats +5 in 12! Ways and divide by only 5! Since it is given that bats are distinct.

[binnapaul]

Sir, how can 49 be the sum of the 6 natural numbers we selected? Isn't 49 the number upto which we can select the natural numbers?

[almaskhan]

sir in question of 30 bats selecting 10 and gaps of atleast 2, it is not possible even if we take minimum gap of 2 , we need 31 bats atleast....check it sir

[anushkaagarwal]

Sir if it says ki 7 friends hai n they can't sit adjacent in a row having 35 seats toh answer will be 29p7 or 29c7.

[subhadattananda]

16:15
Sir, train stop karne wale problem me A >= 0 kyun hoga?

Train ko stop karne k liye pehle 1st station se chalna to hoga nah. To uss hisab se to A ko greater than equal to 1 hona chahiye nah.

[radheshsharmagk]

Gap concept is diffrent from other concepts of P & C so it maybe difficult to understand in first time but if you watch again and again this video you get it.
After watching the first part of video 3 times i can say that it's not difficult concept as look in comments section of this video

[ishika]

Sir I have this one doubt
When variables are not mentioned we calculate unordered solutions
And in this circle and partition method, total solutions are calculated with all possible shuffling
So how this in correct to apply this method in this question?
Please clarify

[sandeepkumarsingh]

Sir urging you to kindly post the missing videos of probabilities. It would be great help for us who are completely relying on your content and and to ace the exam..plz sir🙏

[prayasdivlogging]

for consecutive you took >=1 and for non conseccutive you took same >=1 why