Ok, so I'm going to answer my own question. For the S's, the order doesn't matter because it looks the same no matter which S is placed in any of the eight places. Therefore it is correct to say 8C4. It is equivalent to dividing 8P4 by the 4! repeats of S.
if you take 8P4 then you have to take 4! in denominator for 4 S's like this (8P4/4!). And rather than taking this we can also take 8C4 which value is also same as 8P4/4! so if you take either permutation or combination the answer will be same .....
When to take permutations and when to take combinations. In one of the question, you had taken permutations for the different spaces to be filled and here you have taken combinations.
Thank you for your videos. I'm looking at coming up with names of products by combining words. Is there a software that would offer all these permutations and combinations please
Well done sir, please do video on this type of logarithm question: 4.664³+6 all divided by 4.664³-6 The question says: Evaluate without using calculator.
Please am confused for your video on correction where the vowels are together you ooie where together you did did 4 factori over two factorial why not here
Hi Dr Kumar, I will appreciate your help in solving the following problem- "When all the letters in T,E,N,N,E,E,S,S,E,E are arranged.(i) what is the probability that an arrangement starts from TEN? (ii) also starts from TEN and ends with SEE? " Thanks for your time
Respected sir, this is because in the word CLASS we had only one repeating letter 'S'. While in the word MISSISSAUGA we have 2 repetitions i.e 2 A's and 2 I's and therefore we have divided by 2!×2!. Thank you sir so much. 🙏🙏🙏🙏🙏
If we try to to calculate for the word MISSISSAUGA by old method ( i. e total no. of arrangements less no. of arrangements in which S's are together ) correct ans is not being received :- 11!/ 4!×2!×2!= 415800 S's together= 8!/ 2!×2! = 10080 And 415800-10080= 405720, while the correct ans is 88200. What' s the reason ?? How to calculate for the word Mississauga By old method ????
Ok, so I'm going to answer my own question. For the S's, the order doesn't matter because it looks the same no matter which S is placed in any of the eight places. Therefore it is correct to say 8C4. It is equivalent to dividing 8P4 by the 4! repeats of S.
Thanks for answering that ! I had the same doubt !
I am so lucky ki mujhe video on RUclips aapki Mili I can't tell you kitna sara confusion dur hua h thanks sir😁
Here is related Playlist for you: ruclips.net/video/pgPCTIWMWGk/видео.html
Let me know if that helps. Thanks
Thank you so much! Your explanation was very clear and helped me understand permutations much better.
why 8C4 instead of 8P4 for S? Arrangements are permutations, not combinations.
8c4.4!/4!= 8p
4
Good Question
if you take 8P4 then you have to take 4! in denominator for 4 S's like this (8P4/4!). And rather than taking this we can also take 8C4 which value is also same as 8P4/4!
so if you take either permutation or combination the answer will be same .....
@@mr.Anand_kr correct. Answered my own question 4Y ago...LOL
@@lastchance8142 😄😄😂😂
Hello. I was watching your video. How do the combination play a role in filling up the gaps . Help me understand
Thank you so much sir this has really helped ☺
When to take permutations and when to take combinations. In one of the question, you had taken permutations for the different spaces to be filled and here you have taken combinations.
When and how to use Permutation: ruclips.net/video/yxvyN5r-wxs/видео.html
Hope that helps. Thanks
Thank you for your videos. I'm looking at coming up with names of products by combining words. Is there a software that would offer all these permutations and combinations please
Good idea. Thanks
I can share a related Playlist: ruclips.net/video/pTXMIp9_Qrc/видео.html
All the Best
pacing is just right
sir in part b it can also be possible that 2s or 3s are together , as question does not say that all s are together
Awsome explanation ✌✌
Well done sir, please do video on this type of logarithm question: 4.664³+6 all divided by 4.664³-6 The question says: Evaluate without using calculator.
Thanks. Will do
in part B ,do we not take the arrangement of s with itself?
I have a doubt sir..why we devide the common arrangements from total arrangements instead of substract them
Me too 🧐
Thank you so much sir. Lecture was very good thank you once again😇
Hi sir can you tell me in how many different 4 letter words can be formed from ellipse
helpful
Thanks for explanation
Please am confused for your video on correction where the vowels are together you ooie where together you did did 4 factori over two factorial why not here
what if either of the all the I's are consecutive or all the S are cosecutive or all P's are consecutive sir
Hi Dr Kumar, I will appreciate your help in solving the following problem- "When all the letters in T,E,N,N,E,E,S,S,E,E are arranged.(i) what is the probability that an arrangement starts from TEN? (ii) also starts from TEN and ends with SEE? " Thanks for your time
No
The last one is tricky.
Find the no. Of arrangements of the letter in TALLAHASSEE which have no adjacent A's. Answer pls sir
this is permutation not combination
Tnku sir
The last one I am not able to understand
properly, as well as not getting correct solution ( i.e Ans ). 🤔
Last another Approach: ruclips.net/video/AbbCoXNqyQ8/видео.html
Hope that helps. Thanks
also no boys together: ruclips.net/video/qEiawN7I3_Y/видео.html
Respected sir, this is because in the word CLASS we had only one repeating letter 'S'. While in the word
MISSISSAUGA we have 2 repetitions i.e
2 A's and 2 I's and therefore we have divided by 2!×2!.
Thank you sir so much. 🙏🙏🙏🙏🙏
If we try to to calculate for the word
MISSISSAUGA by old method ( i. e total no. of arrangements less no. of arrangements in which S's are together ) correct ans is not being received :-
11!/ 4!×2!×2!= 415800
S's together= 8!/ 2!×2!
= 10080
And 415800-10080= 405720, while the correct ans is 88200.
What' s the reason ??
How to calculate for the word Mississauga
By old method ????
I am understanding the new method but not getting answer for the word 'MISSISSAUGA' by
old method. 😔😔😔
Thnku sir
Wrong solution
Wrong combination
It will be 4C8 not 8C4
Hence it cannot be applied here
Answer will be 33810
Too slow
Just speed up the video